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King Arms 24” Free Floating Sniper Rifle

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King Arms 24” Free Floating Sniper Rifle

AKA The BushMaster XM15E2S Sniper Rifle




I would like to thank Mark and the team for sending this over for review and after several problems with Japanese Customs and TNT, UPS and finally my savior, Japanese standard EMS the rifle finally got here!


Now unlike the Troy A3 CQC, the BushMaster was sent complete, making it through customs on its third try without a hitch. So anyone shipping into Japan from HK or other Asian countries needs not worry about whether or not your rifle is complete or in kit form as EMS doesn’t care.


Although please note I have found out that UPS and TNT have different rules and regulations here in Japan compared to other countries and as soon as your RIF lands on Japanese territory these rules apply. The main one being that UPS Japan and TNT Japan will not ship RIFs therefore it will land at customs, get red-flagged and sent back to the shipper.


Also please note that the scope, scope mounts and bi-pod are not supplied with the weapon and can be bought separately.


So before we take a look at the King Arms BushMaster XM15E2S Sniper Rifle, let’s take a closer look at exactly who BushMaster is.




Founded in 1978, Bushmaster Firearms International, LLC, Inc. is the leading supplier of AR15 type rifles in the United States. We manufacture both aluminum and advanced carbon-fiber-based AR15 type rifles and accessories and our products are known for quality, reliability, accuracy, durability, and value.


Bushmaster firearms are used by hundreds of police departments and law enforcement organizations nationwide, by the military of more than 50 countries worldwide, in private security and safety applications, and by consumers for hunting, recreation, competition, and home defense and security. We are headquartered in Windham, Maine, with manufacturing facilities in Windham, Maine, Lake Havasu, Arizona and a R&D Facility in Dallas, Georgia.


We already know that King Arms produce models that are known for quality, reliability, accuracy, durability, and value, but just how well do they replicate the Bushmaster?


Let’s take a look!


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The Box.


As you can see from the box, it has taken a beating in transit having made its way back and forth from Hong Kong to Japan not once but three times. Although the box was holed several times the contents was undamaged.




This is due to the thick high compact foam used to secure the weapon into position for storage and transportation. As you can see from the image, the barrel needs assembling due to the length as otherwise it would not fit in the box.




What You Get.


This is were all the imagery on King Arms and other websites gets confusing, the weapon comes as standard with only a 190 rd magazine, nothing else! No bi-pod, no sniper scope. All you get is the weapon and the magazine.


So if you are looking for something exactly like what the picture depicts your going to have to spend some more money.


The Gear Box


Now I would like to point out that upon opening the King Arms BushMaster XM15 E2S (24” Free Floating Sniper Rifle) I was surprised and happy to find the internals, apart from the spring which differs in strength, were exactly the same used in the TROY A3 CQC. So to save time in editing and taking photos I will use the same ones used in the previous review.




Apart from the King Arms logo embossed on the side, the gearbox isn’t very different from the generic version 2 gear boxes found in other replicas.




It’s only until you take a closer look at some of the external features that you start to realize that this isn’t your everyday run of the mill version 2. Now the first thing you notice about the King Arms gear box is the trademark bright red selector plate and just this alone gives you a hint at just how custom this gear box is.




Now I’m always skeptical about so called reinforced parts but in the case of the King Arms products these really are tough. For one they feature copper coated conductors that give a much improved conductor than that of generic plates. They are also made out of the same nylon found in real firearms. This gives them the added benefit of being heat resistant.


Another thing to look out for is the 7mm bearing that are used on the King Arms gear box, these are a huge improvement on plastic bushing and also the 6mm upgrades.




The last thing to note on the external features viewable on the outside of the gear box is the way the two halves are connected. Rather than using a mix of Philip’s and Torx screws, King Arms has replaced them all with Hex bolts. This is a huge benefit to players just getting into the sport or doing field repairs on skirmish days as you no longer need 1 tool specific for one job. Instead you can rely upon a generic tool found pretty much in everyone’s tool box.






Upon opening the gearbox you are greeted with a very impressive sight, and without a doubt this has to be one of the best ‘Stock’ gear boxes I have seen as you can see King Arms has used the same red nylon throughout the gear box.




One of the other things to point out is the use of high quality gearbox grease and the amount used. As you can see they have applied the correct amount as not to swamp the gear box and cause grease to be fired into the air nozzle and eventually the hop unit and barrel. I was sorely tempted not to remove it for the images.




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To the untrained eye the gears look like generic gears. In actual fact they are all made from steel and reinforced. The gears are well machined and mesh perfectly together.


Bevel gear



Spur gear



Sector gear



The other nice feature is that the sector gear comes standard with a sector gear clip (Cam). The benefit of this is that it delays the release of the tappet plate and prevents feeding issues.




The anti-reversal latch is also reinforced steel and is no different to other generic latches on the market, apart from the fact that this has been designed and tested to work with the gears.




The tappet plate is again made from the reinforced nylon and for those of you not believing the amount of punishment these can take you should take a look here. The use of red is really adding to the feel of a custom finish.





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The switch assembly of the King Arms version 2 gear box also uses the same nylon; this assembly is a huge improvement on the generic versions found in Tokyo Marui’s. Not only does it attach to the main housing of the gear box in a more secure manner. Not only that but the springs, and hinge points are of a far better quality and construction.




The soldering is also very good, which is a far improvement on all of the products making their way out of China.




The piston is of a generic 16 tooth design and I was a little disappointed to find that it did not have the gaps along the rail to distribute the grease evenly along the piston as the current design causes grease to build up at the front of the piston increasing the risk of it being blown through the barrel. Also the Piston head is also of standard design and featured none of the more common items on upgrade parts, such as thruster bearings.




The cylinder is also very simple, but I have to say the finish is extremely smooth; this is also of the standard design with no bore up vents. This is due to the length of the barrel not requiring it.




The cylinder head is made from nylon and although looks very plain is actually very well made. The o-ring creates an extremely tight seal between the cylinder and the head. The head though has very limited padding on the reverse side which makes this a little more noisy then certain third party cylinder heads.




The spring guide is well made but again lacking in features often seen in other 3rd party products, again no thruster bearings to aid in keeping the condition of the spring. It is however perfectly capable of doing the job and as I won’t be upgrading the spring or other parts in the gear box, this one will be staying where it belongs.




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Having removed 90% of the internals from the gearbox shell you start to notice where it is reinforced. The obvious place being directly behind the spur gear on both sides of the gear box.






Another thing that is an improvement over the generic shell is the addition of several mounting points on the shell. These help secure the two halves together and enable a better seal.




Hop Unit.


Again the hop unit is the exact same one used throughout the whole King Arms range and as I stated before its perfect, it’s actually the exact same unit that I purchase when upgrading other weapons and has all the features that make this hop unit one of the best on the market.


The sensitivity of the dial is perfect and operators will be able to dial in to their preferred settings with ease and in knowledge that it won’t slip after the first few hundred rounds past through it.




One of the key points to note is that on the opening to the hop unit for the air nozzle to enter there is another o-ring, this again provides an exceptionally good air seal preventing any loss in air pressure.


The barrel looks like a bog standard brass inner barrel but is actually a 6.04 mm tight bore. This is very good quality but for a sniper rifle the operator may wish to switch it out for a 6.01mm barrel. Not only will it improve the groupings at longer rangers but you will probably see an increase in your FPS.






As before there are one or two pieces just like the CQC that let the build down ever so slightly but as we are aware King Arms does not produce those parts. Over all the gear box is outstanding and the overall build and quality would set you back in the margin of $300 USD.


And even more if you swapped out for other brands of reinforced parts for the King Arms ones that are slightly lacking.


So what is my verdict on the King Arms gearbox? Not only am I impressed with the build but also the continual QA that King Arms has in place maintaining the quality of all their products! So I’m still stating that this is the best ‘Stock’ gear box on the market.


For those not quite buying it here is a side by side comparison of the TROY A3 and the Bushmaster:







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The King Arms 24” Free Floating Sniper Rifle.


Yet again King Arms delivers an outstanding gear box that will deliver both the ability to withstand the wear and tear of power users, as well as the reliability for players looking for a stock weapon to last.


Just like the TROY A3 the King Arms 24” Free Floating Sniper Rifle is a complete package, meaning that it’s designed to fit a certain role within the game. In this case a designated sniper rifle, so players looking for a multirole weapon need to look else where.




The barrel as stated is the 24”, making this a mere 7cm longer than the standard M16A2. Unlike the real Bushmaster .450 range the King Arms variant doesn’t come with a flash hider, neither will you be able to attach one due to there being no thread.




The barrel is of a two piece construction and operators worried about potential barrel wobble need not worry. The two halves are locked into place using a grub screw (you will need to remove the barrel heat shield to access it) and then locked tighter once the gas block is attached.




The whole barrel is then locked into place with the locking nut. Once this has been tightened into place the heat shield/fore-grip is then slid over the barrel and screwed into place. There is another washer ring on the locking nut that will lock the fore-grip tight.





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One of the other points were the King Arms and the real Bushmaster differ is on the vents. The King Arms variant only sports the venting on the front of the fore-grip while the real steel has them both at the front and the back.




Needless to say the purists amongst us will be a little disappointed so far with the lack of adherence to the real thing.


One of the other features of the fore-grip is the beautifully textured finish, making it virtually anti-slip.




One of the other disappointments is that the inner barrel does not fully extend to the end of the barrel but stops some 6cm shy of the barrel tip! I’m not sure why King Arms decided not to extend the barrel length but for operators switching over to a 6.01mm barrel it’s not a big deal.




The gas block is of a low profile design, allowing you to mount iron sights to the front, why you would want to do this I have no idea. But the option is there if you choose to do so.




The gas block locks into place by the means of two grubs screws, make sure that you have the block positioned correctly before tightening as these will bore small holes into the second stage of the barrel.




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The upper and lower receiver is exactly the same in design as the one featured in the TROY A3 review and players will not be disappointed with the captive receiver pins.


Players that are used to the old style receivers will certainly appreciate these pins, on closer inspection of the front receiver pin you will notice that the pin has small semispherical indent to it.




This indent is what the spring pin locks into when the receiver pin is pushed fully into both halves of the receiver and prevents the pin from working it’s way loose.




Not only that the same spring pin prevents the receiver pin from fully leaving the lower receiver when disassembling the rifle. Absolutely brilliant!




The other major difference and one that stands the King Arms receivers apart from all the rest is the bolt release catch. At first glance the bolt release catch looks the same as any other. But it’s only until you break it down that you see any difference.




The major difference is that the bolt release catch now has an arm to it that passes underneath the gear box.




This then attaches to another modification to the generic lower receiver design and that is a spring loaded catch. This catch engages the fake bolt as it’s pulled back, locking it in the open position.




By pushing the bolt release catch this then drops the spring catch on the opposite side of the lower receiver thus allowing the bolt to spring back into place.


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Likewise the upper receiver has some differences to when compared to generic metal bodies on the market. The first is that there is actually a channel now for the bolt to slide along, but also the bolt itself is very different.


As you can see the bolt is now spring loaded and when the charging handle is pulled back the bolt also moves back locking with the spring latch.




Now yes, this is a gimmick and its only real use is to hold the fake bolt back without having to also manipulate the charging handle while adjusting the hop unit. But never the less, it’s still something that is useful and offers something a little more unique.


Remember though all that is being moved is that thin piece of steal, so don’t expect the clanks that the SCAR or MP5 ranges offer.


The trades and serials on the receiver set are of the highest standard and again laser etched giving a long lasting finish. Also each weapon has a unique serial number which seems to be the norm now with all 3rd party receiver kits.








Now one of the Key features of the King Arms 24” Free Floating Sniper Rifle is the grip. The weapon sports the target grip which retails alone for $54.00 USD. Now this is a very ergonomic grips and suits both small and large hands alike.




The base plate of the grip is free floating and can be adjusted for the individuals comfort, and is especially useful when either match shooting or if you are waiting for a target to raise its head. As it allows the operator to rest there hand while in the shooting position.


The grip itself breaks down into several pieces and the one thing you will notice is that the base cap doesn’t have any ventilation. Obviously players wanting a weapon with a high rate of fire will require vents but for a weapon primarily designed to fire in semi mode won’t require them.




The finish to the grip is outstanding again, offering a non-slip finish. The other benefit to the finish is that if your hands are dirty or slippery then the grip still offers friction due to the dimple effects.




But you will need to disassemble the base cap if you wish to fine tune the motor height.


The motor used on the King Arms rifle is a non generic motor with no identification as to if it is a high torque or high speed motor, although as you can tell from the photos it is made to a very good standard.





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As many of you are aware either through reading my reviews or from owning a new version King Arms receivers is the way the extension tube has been redesigned to solve many issues faced be players


The design team at King Arms has rethought the design process and has made some changes that are really a benefit.


Players who use a battery stocks and have upgraded to a metal body will all know about the need to ‘Chop’ the extension tube to allow a battery to be fitted. King Arms has designed the length to the precise measurement and not only that added to it!




As you can see they have reinforced the sides to give a sturdier and stress tolerating extension also they have created a gully that allows the cables to run over the bolt that holds the buffer tube to the lower receiver, thus reducing the risk of the cables getting pinched or severed.




Now like the TROY A3 the cable from the gear box terminates early, this is because of another excellent feature designed by the King Arms team.


From customer feed back, one of the weak points on solid stocks is the way the stock attaches to the gun. The buffer tube only extends half way down the stock, but with the new design, the tube extends all the way down the solid stock.




The other benefit of this is that you won’t split the stock in half from over tightening the ‘Philip’s’ screws on the butt of the stock.


From the above image you can also see that the stock comes pre-wired and has the capacity to fit a large type battery.


One other thing to note is the texture of the stock, as it has that felted texture to it, this makes the stock more comfortable when shouldered, but the life span of such a finish must truly be limited, especially if you are going to be using the weapon in the field rather than for match shooting.




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Finally we have the 190 rd magazine. This is pretty much identical to other generic models on the market apart from the embossed King Arms logo on the base plate. I’ve only fired off around 500 rounds in semi through the weapon, but in that short space of time did not experience any double feeds or jams.




Just like the other King Arms magazines I’ve tested the winding mechanism is very smooth and over winding will not result in the spring releasing. Also again I tested inserting the magazine at all angles both gently and combat slap, again without the spring releasing.’


But only a years worth of abuse in the field will really tell if the magazine is dependable or not.




Score & Conclusion.


Now I have to say that without a doubt, I’m truly impressed yet again with King Arm’s dedication to both innovation and design. The gear box like I said earlier, in my eyes has to be the best stock gearbox on the market. But there are just a few things that really disappointed me.


The first one like I said is the lack of bi-pod and scope as standard, all the images from Redwolf to the King Arms home page show this model with all the accessories, yet they don’t come as standard.


The other is the detraction from the real steel weapon, and the lack of muzzle brake or flash hider and a few other little features again slightly disappoint me. Don’t get me wrong this weapon is amazingly well designed, built and balanced and would make a fantastic addition to anyone’s arsenal but for those of you like me that looking for a perfect replica might feel a little let down.


So I’m going to give the King Arms 24” Free Floating Sniper Rifle 7.5/10


Those of you that aren’t so fussy about adhering to a perfect replica will certainly mark this higher more likely in the 8 or 9/10.


Many thanks again to Mark and the Team at King Arms for supplying us with this product.



Edited by FarEast
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Hmm...Im very interested in this as a DMR, having been massively disappointed with my DBoys SPR Mod1.


I just need to know how accurate it is with the standard barrel, and how long a barrel will it accept? Im guessing it must be under 1J power to get into Japan, but what is it reading?


Cheers :)

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Hmm...Im very interested in this as a DMR, having been massively disappointed with my DBoys SPR Mod1.


I just need to know how accurate it is with the standard barrel, and how long a barrel will it accept? Im guessing it must be under 1J power to get into Japan, but what is it reading?


Cheers :)


Im able to hit my usual target, which is a give way traffic sign (Identical in size and shape to UK ones) at a little over 50 meters. That is without fine tunning the hop perfectly or zeroing in the scope.


As for the power, not 100% yet as my Chrono is the type you screw on to the end of the barrel.


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  • 1 year later...

I picked one of these up at War and Peace this year and have to say that I am rather impressed with it. It is a very nice rifle to told and use, with a decent amount of weight behind it, without being overly heavy.


My first chance to use it was at The Mall in Reading, not the idea location, but I was left little choice when both my mates guns failed and I had to lend him my G36. The front RIS actually became quite helpful to mount my M3 to for sneaking around the basment. When I did get to shop level, it was clear that the rifle did have a range advantage. One little niggle is the power that it produces, when first chrono'd it was kicking out ~300 fps and when at my home site, about 3 weeks ago, it was doing ~260. Despite this unknown drop in power, it was still ranging better than a lot of guns that were running 320+. To really use this rifle to its potential I think that it could use a boost from something like an M100.


As FarEast stated, the life span of the texture on the stock will be limited and mine has started to be affected from where it rubs constantly on my kit. and other objects it comes into contact with, such as branches. The one other problem I had with quality was the 190rd hi-cap they provided. When being wound the little tab that stops the bbs from coming out was clearly minutely too small and therefore when the spring reached a certain tension, bbs would spray out and the mag would unwind. Thus leading to only being able to part-wind it before being put in the gun, and having to wind it the rest once loaded.


To gain the look like that on the box I added the scope and bi-pod from my G-spec. It sets the rifle off very nicely and really gives it more of a DMR appearance. However rear of the scope sits back too far and does partially obstruct the cocking handle.


Overall it is a very nice rifle and the quality is impressive, even compared to my G&P M16. Only problem areas are the stock and the power output.


On a side note; FarEast, is there a certain way to seperate upper and lower receiver? I have tried removing the body pins & bolt release but it still feels as if something is holding it together, and I am unwilling to use force.







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  • 1 month later...

I just got my XM15E2S. I wanted the fluted barrel type but meh.


I dont know about firing yet because I cannot test it at home, but I have looked it over and am NOT impressed.


The paint is already starting to scratch off the barrel. Gas block is held with grub screws onto the barrel tube which is not ideal (though at least 2 are better than 1). Foregrip attracts dust easily so the powdercoating has gone a greyish colour.


The reciever halves are 2 distinctly different shades. Fire selector feels somewhat loose. The stock coating picks up dust easily and has gone grey.


Totally unforgiveable though is the abysmal buttplate which looks and feels like it came off an LPEG. It is plastic, the hatch doesnt lock into place easily, and the wiring is thin and cheap. I dont think theres a fuse. The stock is thinner than most so it is a squeeze to get Sub-C cell batteries in there.


I cannot believe I paid over £300 (after VAT) for what feels like a cheap and nasty DBoys.



Oh, I got a VN midcap and a normal Hicap.

Edited by GuzziHero
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I just got my XM15E2S. I wanted the fluted barrel type but meh.


I dont know about firing yet because I cannot test it at home, but I have looked it over and am NOT impressed.


The paint is already starting to scratch off the barrel. Gas block is held with grub screws onto the barrel tube which is not ideal (though at least 2 are better than 1). Foregrip attracts dust easily so the powdercoating has gone a greyish colour.


The reciever halves are 2 distinctly different shades. Fire selector feels somewhat loose. The stock coating picks up dust easily and has gone grey.


Totally unforgiveable though is the abysmal buttplate which looks and feels like it came off an LPEG. It is plastic, the hatch doesnt lock into place easily, and the wiring is thin and cheap. I dont think theres a fuse. The stock is thinner than most so it is a squeeze to get Sub-C cell batteries in there.


I cannot believe I paid over £300 (after VAT) for what feels like a cheap and nasty DBoys.



Oh, I got a VN midcap and a normal Hicap.


the difference in mags was the Ehobby offer not King Arms offer.

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I found that I was missing a grub screw on the underside of the barrel, just behind the gas block, this was allowing it to come loose easily. I managed to find one that fits and it is much better now.


I agreed about the buttplate and the selector switch. KA should have put in a bit more effort.


After a bit of playing with it, I have got quite impressive performance. Am looking to get a 590mm PSG1 barrel, to bring it closer to the end of the outer barrel.

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Happens to be, I have a PSG-1 barrel. heeheeheee. I think mine is only a 550 though.


Thought the PSG1 was a 590mm std and the PSG1+ a 6**mm


On further investigation and a thread found on another forum. A PSG1 standard barrel is 590mm, which would fit this quite nicely (PSG1+ is 650mm). Though, I need to check how much the inner barrel falls short. PSG1 might be a touch too long, which would mena cutting it. If that's the case, I'm not going to bother.

Edited by triggerhappy16
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Given another look over, this isnt as bad as I initially described. Most of the problems are pretty minor.


With more handling, the foregrip dusting doesnt seem as bad. It could have just been left over dust from the engraving of the foregrip texture. The grub screws for the gas block seem to do a good job, Ive tried to shift it and can't.


The reciever is solid as a rock, although the differing shades are still odd. The body feels much better quality in construction and painting than CA and miles ahead of G&P. Feels lighter though which is odd. The paint is nice and solid all over and a slightly off-gloss finish which looks perfect.


The trades are woefully inaccurate (this actual model should be a Bushmaster Varminter) but that doesnt worry me so much.


My only real issue with the gun now is the stock (the felting going while), the wiring and that godawful buttplate. Its like the designers just fell asleep after the reciever was done.

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3rd post in a row but...yknow, edit timeout.


Anyway, I playtested this gun today. As expected the hop was awry till it was bedded in a little better. With a 9.6, this fires fast as pretty much anything and feeds well from mags by CA, ICS, DBoys and Double Eagle. The actual King Arms hicap jammed early on and needs a looking at.


Admittedly I have fitted a Prometheus 590mm barrel (the original is an odd 560mm), but the range is pretty damn impressive. The hop unit has sealing rings all over it, so this probably helps.


Chronod it, its doing 280fps hop-off, and 240fps hop-on with .2g BBs. Despite this lowish power, it performed pretty much as well as anything out there so Im likely to leave it as it is.


Overall I'm impressed with the quality...except for that buttplate!

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