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MagPul PTS MASADA ACR

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It's unfortunate that your Tavor microswitch caused such problems, but it's very useful for Masada owners to know about! The microswitch is actually mechanical, and not electronic. If your gunsmith can modify the switch with thicker metal, it will decrease resistance thereby increasing the current it can handle. It does seem like an unnecessary modification however, considering that a MOSFET would bypass the microswitch completely while providing other benefits. I'd be suspicious of a gunsmith who felt he didn't have the skill to install a MOSFET in the Masada. While it's more complicated than some guns, it's easily possible as the handguard area is very spacious for extra electronics etc. I have a SW-AB LONG from Extreme Fire, with some extra electronics I've added to power my internal LED tracer unit.

 

Systema gears are notoriously weak, so I would avoid them. When they fail they can take other parts with them due to loose pieces of metal getting caught between other moving parts. Again, there's more info on this at AirsoftMechanics.com. I would recommend forking out the money for a set of Siegetek gears, but people have had good results from the cheap SHS/5KU/Element gears (all the same product, rebranded).

 

I don't know what your target FPS is, but I'm not knowledgable enough to say what power level might damage the gearbox structurally. You may well be able to go higher than a PDI 190% spring, but you will have to check ASM (linked above), research it, then make an educated guess based on information on V2 gearboxes (or even better ARES V2 gearboxes). You should also be aware that you can gain higher FPS simply by improving the airseal, so that should be your first goal if you want to use a slightly weaker spring. Teflon tape around the cylinder head, and around the hopup bucking will prevent airleaks at those points. Unfortunately the proprietary air nozzle has no O-ring inside it, presenting an airleak with no easy solution. You might be able to modify an airseal nozzle designed for a different gun to work in the Masada, such as this one after tapering the end to actually fit inside the bucking. Also I found the stock O-ring to cause too much friction inside the cylinder. I replaced mine with a stock TM O-ring with great results.

 

Let me know how your upgrade progresses.

 

I appreciate your gesture in correcting my mistaken notion regarding micro switches and their mechanical nature. Perhaps, I should learn to be more trustful of local gunsmithing skills. However, I neglected to ask what type of cut-off lever the Magpul ACR has? I ask, because a team mate's ACR now refuses to engage single/semi firing.

 

As for the Siegetek gears, I've seen a set or two and was quite curious about them. SHS gears on the otherhand, I've had some horrific experiences with them, where they completely failed in the heat of battle. Local airsofters wouldn't touch them with a ten foot pole (but then again, it could possibly be attributed to poor tuning).

 

My target FPS is 430-450 FPS, but that may seem overly optimistic at this point.

 

Thankfully, I have yet to experience any problems with my systema geared AEGs. But I will take your advice and purchase siegetek gears. I will likewise apply your very sound suggestion re: teflon taping the cylinder head. As for my choice of Mosfet, I purchased a TMX Pro with active braking. Frankly, I don't know the brand, but the two recent local gunbans related to our national elections and the much publicized and bungled tourist bus hostage incident which resulted in the deaths of several Hong Kong tourists, and the resultant yet understandable resentment of the Chinese towards my countrymen, have made importation all but impossible.

 

Not to worry though, I will be visiting my sister in Chelsea soon, and I intend to make up for the supply shortfall with ample purchases from Red Wolf UK while I'm in England.

Edited by warspite

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Siegetek gears, although pricey, are quite durable and strong. I've put in the GS-R 14:1 into my ACR. As for SHS, I don't have any experience with them but I have seen ppl put up failures on the web :-

 

http://forums.airsoftmechanics.com/index.php?topic=3505.0

 

My ACR is comprised of Siegetek gears, AWS Scorpion X445, and Planet AE1000 motor. I'm -very- happy with this combination.

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Tacticus do you have any pictures of your internal upgrades/hop/wiring mods?

 

I don't have any, but I can take some. It's not very pretty in there but it all works. Is there anything specific you'd like to see?

 

Advice on upgrading the hop would be a huge boon ;)

 

I don't have the space to do proper accuracy tests, so I don't know if the hopup even needs upgrading. The nub is intergrated into the hopup unit, which I haven't opened up yet as I still need to buy a 4mm roll pin punch, so I can't say how easy it would be to replace with a regular nub.

 

I appreciate your gesture in correcting my mistaken notion regarding micro switches and their mechanical nature. Perhaps, I should learn to be more trustful of local gunsmithing skills. However, I neglected to ask what type of cut-off lever the Magpul ACR has? I ask, because a team mate's ACR now refuses to engage single/semi firing.

 

I only know this because I took the microswitch apart to see how it worked! I'm one of those people who has to take everything apart :) I'd still be wary of a gunsmith who favoured modifying a microswitch over installing a mosfet though. The benefits of a mosfet are just too great to justify fiddling about with a miscroswitch, in my opinion.

 

The cut-off lever is also proprietary unfortunately, but without having it in front of me I can't say if it's the cause of the problem. The whole trigger/fire selector design is actually very poor, and there are many possible causes. Loose manafacturing tolerances being a major concern.

 

As for the Siegetek gears, I've seen a set or two and was quite curious about them. SHS gears on the otherhand, I've had some horrific experiences with them, where they completely failed in the heat of battle. Local airsofters wouldn't touch them with a ten foot pole (but then again, it could possibly be attributed to poor tuning).

 

Siegetek gears, although pricey, are quite durable and strong. I've put in the GS-R 14:1 into my ACR. As for SHS, I don't have any experience with them but I have seen ppl put up failures on the web :-

 

http://forums.airsoftmechanics.com/index.php?topic=3505.0

 

Yeah, some people have had bad experiences with SHS gears, myself included. I actually started an almost identical topic to the one you linked to, Anakchan. I should have been more specific when suggesting them: They are very affordable, so can be worth experimenting with if you don't want to fork out $100+ for a set of Siegetek gears. If they do break, it's the gear axle that goes so it can be replaced with a different axle (from a TM gear for example). I haven't seen any reports of the actual teeth breaking. Reports of axle failures have dried up now, so it may have just been a bad batch. I'd buy them again for a budget build, but if I can afforf it I'd go for Siegetek every time. I don't think anyone has broken Siegetek gears, at least when using them for their intended purpose. They also have some very nice design features.

 

 

My target FPS is 430-450 FPS, but that may seem overly optimistic at this point.

 

That doesn't sound too optimistic to me. If you don't want to get your hands dirty with upgrading and tuning it yourself, a decent gunsmith will be able to reach that power level reliably.

 

Not to worry though, I will be visiting my sister in Chelsea soon, and I intend to make up for the supply shortfall with ample purchases from Red Wolf UK while I'm in England.

 

How long are you in London for? I actually live in London, so if you brought your Masada gearbox with you, I could actually upgrade it for you while you're here. I don't think Red Wolf UK sell directly to the public, but there are plenty of retailers here. Unfortunately they are fairly expensive, and don't sell the cheap Chinese products I like to use, so I prefer to order from eHobbyAsia to save money. Orders usually take only 7 days to arrive so this might be a feasible option for you too.

 

While you're in London you might want to visit Wolf Armouries in Camden. It's nothing special and overpriced, but they have a few nice bits of kit lying around.

 

My ACR is comprised of Siegetek gears, AWS Scorpion X445, and Planet AE1000 motor. I'm -very- happy with this combination.

 

Similar to mine, apart from the 'fet. Have you installed the gearbox, hopup and bolt release sensors for your Scorpion? I've wanted to try out an AWS 'fet for a while now.

Edited by Tacitus

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Similar to mine, apart from the 'fet. Have you installed the gearbox, hopup and bolt release sensors for your Scorpion? I've wanted to try out an AWS 'fet for a while now.

 

No unfortunately not. So my Scorpion is merely emulating a Pulse at the moment. I'll need to do quite a bit of drilling of that metal block housing the hop chamber sits in. Not looking forward to that at the moment.

 

In terms of trigger response though, I'm very happy with my setup currently. The response is simply phenomenal with the FET, motor & hi-speed gears.

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Got my Masada yesterday. Absolutely love it. Only problem is that i havent been able to get out to skirmish it yet. So ive been target shooting from around 20 feet away. But as a target on a box the size of a 5p coin, it seems to be shooting ( with no hop on) , an inch to the right, and about 3 inches down.

 

Would this be about right from 20ft?

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Got my Masada yesterday. Absolutely love it. Only problem is that i havent been able to get out to skirmish it yet. So ive been target shooting from around 20 feet away. But as a target on a box the size of a 5p coin, it seems to be shooting ( with no hop on) , an inch to the right, and about 3 inches down.

 

Would this be about right from 20ft?

 

Suggest you set your hop correctly and adjust the iron sites. The rifle zero's pretty well with irons, red dots and scopes despite the usual airsoft smooth bore effect :)

 

 

 

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I don't have any, but I can take some. It's not very pretty in there but it all works. Is there anything specific you'd like to see?

 

 

 

I don't have the space to do proper accuracy tests, so I don't know if the hopup even needs upgrading. The nub is intergrated into the hopup unit, which I haven't opened up yet as I still need to buy a 4mm roll pin punch, so I can't say how easy it would be to replace with a regular nub.

 

 

 

I only know this because I took the microswitch apart to see how it worked! I'm one of those people who has to take everything apart smile.gif I'd still be wary of a gunsmith who favoured modifying a microswitch over installing a mosfet though. The benefits of a mosfet are just too great to justify fiddling about with a miscroswitch, in my opinion.

 

The cut-off lever is also proprietary unfortunately, but without having it in front of me I can't say if it's the cause of the problem. The whole trigger/fire selector design is actually very poor, and there are many possible causes. Loose manafacturing tolerances being a major concern.

 

 

 

 

 

Yeah, some people have had bad experiences with SHS gears, myself included. I actually started an almost identical topic to the one you linked to, Anakchan. I should have been more specific when suggesting them: They are very affordable, so can be worth experimenting with if you don't want to fork out $100+ for a set of Siegetek gears. If they do break, it's the gear axle that goes so it can be replaced with a different axle (from a TM gear for example). I haven't seen any reports of the actual teeth breaking. Reports of axle failures have dried up now, so it may have just been a bad batch. I'd buy them again for a budget build, but if I can afforf it I'd go for Siegetek every time. I don't think anyone has broken Siegetek gears, at least when using them for their intended purpose. They also have some very nice design features.

 

 

 

 

That doesn't sound too optimistic to me. If you don't want to get your hands dirty with upgrading and tuning it yourself, a decent gunsmith will be able to reach that power level reliably.

 

 

 

How long are you in London for? I actually live in London, so if you brought your Masada gearbox with you, I could actually upgrade it for you while you're here. I don't think Red Wolf UK sell directly to the public, but there are plenty of retailers here. Unfortunately they are fairly expensive, and don't sell the cheap Chinese products I like to use, so I prefer to order from eHobbyAsia to save money. Orders usually take only 7 days to arrive so this might be a feasible option for you too.

 

While you're in London you might want to visit Wolf Armouries in Camden. It's nothing special and overpriced, but they have a few nice bits of kit lying around.

 

 

 

Similar to mine, apart from the 'fet. Have you installed the gearbox, hopup and bolt release sensors for your Scorpion? I've wanted to try out an AWS 'fet for a while now.

 

I've been to Red Wolf HK and had purchased direct from their HK office (in Kawloon), so I assume the same is true in England (although I must admit, for a lawyer, I never bothered to check UK laws re: airsoft related purchases). I will probably be there the second week of January and will be staying at Chelsea Cloisters (as I do not want to impose on my sister's family) for two to three weeks, then it's off to Brussels. I am very curious about Wolf Armories though.

 

I must apologize Tacitus, Im a creature of habit, and often reluctant to try out new things even when it comes to airsoft parts. Although, as I type this message, I have on my table, Siegetek gears I purchased yesterday. I appreciate your tremendous assistance in sorting out my ACR. All I need now is a skillful gunsmith (I might just take you up on your offer should no sufficiently competent gunsmith be found locally).

 

I had the opportunity to watch my friend open his ACR's gearbox, and you were right. That was the smallest and weirdest looking cut-off lever I have ever seen. As you have forewarned me, the cylinder head is unique in having an unusually long brass nozzle which dictates an equally odd airseal nozzle without any 0-rings. The only redeeming quality of the ACR other than its handsome externals, is perhaps its nicely reinforced gearbox.

Edited by warspite

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The Siegetek gears are very durable and it's made by RiotSC of whom you can find on Airsoft Mechanics (http://forums.airsoftmechanics.com/index.php?topic=1208.0). Personally, I like to buy and support a product from someone whom I have direct access to on the forums. Similarly Extreme Fire and AWSAirsoft.

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I've been to Red Wolf HK and had purchased direct from their HK office (in Kawloon), so I assume the same is true in England (although I must admit, for a lawyer, I never bothered to check UK laws re: airsoft related purchases). I will probably be there the second week of January and will be staying at Chelsea Cloisters (as I do not want to impose on my sister's family) for two to three weeks, then it's off to Brussels. I am very curious about Wolf Armories though.

 

I must apologize Tacitus, Im a creature of habit, and often reluctant to try out new things even when it comes to airsoft parts. Although, as I type this message, I have on my table, Siegetek gears I purchased yesterday. I appreciate your tremendous assistance in sorting out my ACR. All I need now is a skillful gunsmith (I might just take you up on your offer should no sufficiently competent gunsmith be found locally).

 

I had the opportunity to watch my friend open his ACR's gearbox, and you were right. That was the smallest and weirdest looking cut-off lever I have ever seen. As you have forewarned me, the cylinder head is unique in having an unusually long brass nozzle which dictates an equally odd airseal nozzle without any 0-rings. The only redeeming quality of the ACR other than its handsome externals, is perhaps its nicely reinforced gearbox.

 

Let us know if you manage to buy directly from Redwolf UK. I thought they only sold to retailers but if not they could be a great source. Wolf Armouries is really nothing special, and the gunsmiths there don't know much at all. But it's the only airsoft shop in London so you might as well check it out.

 

Glad you've invested in Siegetek gears. They're probably the best single product I've purchased for airsoft.

 

Of the proprietary parts in the Masada, only the air nozzle and hopup nub cannot currently be easily upgraded. I've read about a method used to install an o-ring into an air nozzle, which should work for the Masada, but I don't have a decent lathe with which to try it. Apparently someone tapered the hole and glued an o-ring inside the opening, which should produce the same result as a normal airseal nozzle. I might try the method with an old air nozzle I have lying around to see if I can do it, and then carefully try it with the Masada nozzle.

 

Sorry for the offtopic question, but why are you guys like those Siegetek gears that much? And where do you buy them?

 

They are the strongest gears you can buy. Nobody has reported breaking them. They also have some nice design features which make them superior to other gears.

 

I should warn you not to buy them from a shop in Denmark called 'Airsoft Performance", run by someone on Airsoft Mechanics called 'Ringsted'. They resell Siegetek gears, but I was sent a faulty gear which did not fit in the bearing. It took a two months to finally get a working gear sent, including being ignored for two full weeks and having the owner be very reluctant to replace the faulty gear. At first he told me to modify it myself. Only after speaking to the manafacturer did he agree to replace the faulty gear with a working one. He actually wanted to just grind down the original gear and send it to me, but I argued that I paid for a brand new, working gear so that's what I should recieve. It ended up being the worst experience I've ever had with any retailer, let alone in airsoft. Always make sure you buy directly from the manafacturer, who has his own sub-forum on airsoft mechanics.

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Wolf Armouries is really nothing special, and the gunsmiths there don't know much at all.

 

I'd just like to state that as completely untrue; A personal friend of mine is now the Wolf engineer, and has been for the past month or so. He's excellent at what he does; However, Wolf have only had 6 Masadas delivered, and i don't believe Jon has opened one up yet. It's definitely not the best place to get a Masada tinkered with as a result of this, i just felt the need to state the current Wolf gunsmith is excellent at upgrading and repairing any existing platform that isn't quite as brand spanking new as the Masada.

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I'd just like to state that as completely untrue; A personal friend of mine is now the Wolf engineer, and has been for the past month or so. He's excellent at what he does; However, Wolf have only had 6 Masadas delivered, and i don't believe Jon has opened one up yet. It's definitely not the best place to get a Masada tinkered with as a result of this, i just felt the need to state the current Wolf gunsmith is excellent at upgrading and repairing any existing platform that isn't quite as brand spanking new as the Masada.

 

Erm, it's still a standard gearbox, really. although the gearbox shell is a different form factor to the standard V2/3, the internals are all standard ARES affair. I fail to see how it is so incredibly difficult to upgrade compared to any other Ver 2, 3, 6, 7 gearbox etc etc.

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I'd just like to state that as completely untrue; A personal friend of mine is now the Wolf engineer, and has been for the past month or so. He's excellent at what he does; However, Wolf have only had 6 Masadas delivered, and i don't believe Jon has opened one up yet. It's definitely not the best place to get a Masada tinkered with as a result of this, i just felt the need to state the current Wolf gunsmith is excellent at upgrading and repairing any existing platform that isn't quite as brand spanking new as the Masada.

 

 

A friend of mine just last week had a faulty G36C returned to him from the techs at Wolf Armouries. They did not fix his gun, and reported that the feeding tube was cracked and couldn't be repaired. I openend it up and found no such breakage. There was evidence suggesting that the gearbox was never opened ie. factory locking glue still holding the gearbox screws in, brand-new looking screws heads etc. If I can fix it, any airsoft tech should be able to. Espescially one attached to a retailer.

 

I've had conversations with the techs at Wold Armouries in the past and I distinctly remember the terms 'angle of engagement', 'gear ratio' and 'sorbothane' were lost on them. Basic stuff that every tech needs to know. Based on my experience with that company, I would strongly advise against submitting your gun to them for repair.

 

I don't know how their tech department is organised, and I haven't spoken to Jon personally. My comments are only in reference to Wolf Armouries the company, not any single individual. But in my experience of their technical work, it is severely lacking.

 

 

Erm, it's still a standard gearbox, really. although the gearbox shell is a different form factor to the standard V2/3, the internals are all standard ARES affair. I fail to see how it is so incredibly difficult to upgrade compared to any other Ver 2, 3, 6, 7 gearbox etc etc.

 

 

I've been itching to say this exact same thing in this thread for a while now. There are a few quirks which can be learned in a day of tinkering, but it's still just an AEG

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Played my new Masada for the first time today, fired faultlessly throughout. Around 2500 rounds fired, every single one of them on semi-auto, no lockups, and all powered by a 2200mAh 7.4v li-po.

 

Managed to get it set up with an X400 weaponlight and the bb's were flying straight and true to where the laser on aiming. Even with the folding stock extending 2-3 notches it's still compact enough for CQB play, though i did fold it over for clearing stairwells.

 

Overall couldn't be happier with my Masada.

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First fielding for me yesterday, the hophup was acting up, I think because of the lube still in there, after a thousand BBs is started setting up a little better but still not awesome. Then at the very end of the day it locked up... with a spring less powerful than the stock's one...

Battery was still way full, so no idea why it happened.

 

Already ordered the guarder bucking, we'll see how this helps.

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First fielding for me yesterday, the hophup was acting up, I think because of the lube still in there, after a thousand BBs is started setting up a little better but still not awesome. Then at the very end of the day it locked up... with a spring less powerful than the stock's one...

Battery was still way full, so no idea why it happened.

 

Already ordered the guarder bucking, we'll see how this helps.

 

Got a link to the bucking you ordered? Ta XD

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First fielding for me yesterday, the hophup was acting up, I think because of the lube still in there, after a thousand BBs is started setting up a little better but still not awesome. Then at the very end of the day it locked up... with a spring less powerful than the stock's one...

Battery was still way full, so no idea why it happened.

 

Already ordered the guarder bucking, we'll see how this helps.

 

 

Strange....

I'm using the stock bucking with .26 ammo, and tried 3 different spring strengths (stock, M120, and now M135).

Hop-up working great (don't need to turn it all the way up, maybe only 3/4 for the range I need, which is far).

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Strange....

I'm using the stock bucking with .26 ammo, and tried 3 different spring strengths (stock, M120, and now M135).

Hop-up working great (don't need to turn it all the way up, maybe only 3/4 for the range I need, which is far).

 

Yeah, I was playing with 0.20, maybe I should try 0.25, this might help a bit. But on the other hand, I've been using the ARES Tavor with 0.20 since it was first released, and it's deadly accurate, so it's not just the ARES hophup+0.20.

Anyway, Guarder incoming soon, I'll give a feedback when once I field it again.

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