chas Posted August 12, 2012 Report Share Posted August 12, 2012 Link: http://www.acmgear.com/advanced_search_result.php?keywords=a%2B&x=0&y=0 The A+ Studio hop up rubber is advertised as being capable of stretching the range of your airsoft gun more than noticeably. First video of this product showed a WE Glock 18C accurately shooting out to 60 metres (197 feet). Let’s see how much of this is true. Im not the mechanical type, so Im just gonna give you my impressions on this rubber. I turned it inside out so you can see the surface that gives the BB its spin: it’s much wider than the average rubber and the circumference seems to give a more The hop up rubber comes in a little plastic baggie, together with a small piece of paper stating the hardness level (depending on the power your gun is shooting at), you may need a 60’ (up to 330 fps), a 70’ (340-390 fps) or an 80’ 83’ (390 fps and above), and the type of gun for which this specific rubber is made (AEG, Gas Pistol or sniper rifle, careful: just a few models can take this rubber). I wish they came mounted on a piece of plastic tube (like Madbull’s), as mine came a bit flattened. No hop up nub is included. I guess you can use the standard one. Installing these parts is very easy (once you get the inner barrel and hop up unit out; this can take less than a minute on most M4 type AEGs, to 10 minutes on more complicated guns). Get yourself a disassembly guide for your gun, study it, get a clean working surface (white towel so small parts dont jump around and can be easily seen). Disassemble the hop up unit. Take the standard rubber out and substitute with the XX. Make sure it’s in the correct position. Carefully mount back into hop up chamber and reassemble the whole gun. The theory is that the wider contact surface is going to provide the BB with a more thorough backspin. Also, the inner curve of the contact surface should provide better control of the BB, as it is touching it more widely, which should increase precision, IMO. There are people on this forum who know whay more about the physics of these. Look for hop up rubber mods, R-Hop, etc. Performance: I used KSC 0,20 gram BBs. I tested this in a stock JM SR-16 with a 13.5’ barrel (CQBR style). Stock inner barrel (cleaned), stock everything. Stock FPS: 341-352. Hop up adjusted. The average range of the gun was (in a circle of about 2 meters in diameter) from where I was shooting in kneeling position: 60 meters (200 feet). At around 30 meters (100 feet), I hit this box 12/20 times. At 12 meters (40 feet) I got this grouping. On the same gun, after just changing the hop up rubber and leaving everything else as it was, I got these results: FPS: went up to 358-366. Because of the tighter fit against the BB, there’s a better seal, I guess. Range: Shooting from more or less the same position, I got the BBs to drop at around 80 meters (260 feet). At around 30 meters (100 feet), I hit this box 18/20 times. At 12 meters (40 feet) I got this grouping. Quote Link to post Share on other sites
jal3 Posted August 12, 2012 Report Share Posted August 12, 2012 2 ring pattern. Try a different brand of BB. 'FireKnife' Quote Link to post Share on other sites
Isamu Posted August 12, 2012 Report Share Posted August 12, 2012 Not bad, but, could you test them with 0.28 or heavier BBs? If I recall correctly, these buckings were meant to be used with heavy ammo (o.28 and up) and results should be much much better with heavier BBs but to be honest, Im a bit worried about the increase in FPS... most of us have our guns tuned for legal power in our regular fields, and if this bucking rises the power so much... well, it can be unconvenient Quote Link to post Share on other sites
frogfish Posted August 12, 2012 Report Share Posted August 12, 2012 I did simmilar tests in a 225mm madbull python 2 as compared to a promy purple and a angle custom black h nub at ~1j with ksc .25g BBs. I found a decrease in range and overall accuracy with the A+ REAPs, so much so I felt keeping a record was useless. Quote Link to post Share on other sites
aznriptide859 Posted August 13, 2012 Report Share Posted August 13, 2012 The REAPS seems to be ridiculously inconsistent with AEG's, but give a very minor improvement in pistols. I just got 2 for my PX4 and my G18C, when I finally fix those I'll see if there are any improvements. Quote Link to post Share on other sites
Isamu Posted August 13, 2012 Report Share Posted August 13, 2012 AZN, hurry and fix those pistols, we are waiting for your report Quote Link to post Share on other sites
Reppyboyo Posted August 13, 2012 Report Share Posted August 13, 2012 For what it is worth the REAPS rubber in my WE M4 is fantastic. FPS went up by 50 (!), range is increased a fair amount. I currently out-range everyone at the current site. (Been told this mostly by marshalls) Accuracy is also excellent. Quote Link to post Share on other sites
aznriptide859 Posted August 13, 2012 Report Share Posted August 13, 2012 AZN, hurry and fix those pistols, we are waiting for your report I might just shove one in my TM G17 for the time being and see how that goes. Quote Link to post Share on other sites
Isamu Posted November 18, 2012 Report Share Posted November 18, 2012 Kind of necro, sorry. Got to test the AEG bucking, bought from ACMGear, the softest one and while my range has certainly improved I found a weird effect, maybe it is due to the bucking not being "broken" yet, but the first 10 or 15 BBs were not affected by hop, the hop then made its effect and started spitting BBs as expected. Cant say they were my most precise shots as it was a VERY windy day, but I have to admit Im very pleased with the result, 8$ bucking+5 minutes of work, instant range improvement. My setup is, to be precise: ICS Sportline M4, Internally stock Guarder 6.02mm TBB, 300mm long SCS nub A+ 60 degree Devil Bio BBs 0.28g Quote Link to post Share on other sites
Wild_XIII Posted December 5, 2012 Report Share Posted December 5, 2012 I just got one of these to replace my XDM's hop rubber. I also polished the inner barrel (the finish on the WE barrel was just shocking!) and added this to the gun, I can visually tell the BB is moving faster, however seems as I can only see up to about 25 - 30 meters in the dark I can't be positive of the accuracy or range. It does 'seem' to be more accurate, but I can't really tell for certain. I'll do some more range testing on Saturday where I can use the full length of my garden. Quote Link to post Share on other sites
dazdarren Posted December 7, 2012 Report Share Posted December 7, 2012 I believe the V2 version is coming/came out! The hop up contact patch is now in V-shape Quote Link to post Share on other sites
Isamu Posted December 7, 2012 Report Share Posted December 7, 2012 My AEG "soft" model seems to be affected by cold quite a bit. For the game this weekend I have changed the nub from an scs to a stock ics and washed the bbs to see if they get more friction, hence spin and heat. Wish me luck Dazdarren: Is there a pic of the new bucking or some news? thanks Quote Link to post Share on other sites
Wild_XIII Posted December 7, 2012 Report Share Posted December 7, 2012 I really didn't think about washing BB's! Which thinking about it would be a great idea seems as when I took my KWA bucking out of my MP9 it had quite a but of residue on the "bump". Time to start washing or change BB brand methinks! Quote Link to post Share on other sites
Isamu Posted December 7, 2012 Report Share Posted December 7, 2012 Me neither, but I had some issues with the bucking not making effect these last two games and when I saw the bbs the first thing I thought was "wow, thats shiny", and shiny things dont grip very well... so I decided to test them after a slight washing Quote Link to post Share on other sites
dazdarren Posted December 7, 2012 Report Share Posted December 7, 2012 Sorry I dont have a picture, but if you go onto Boobiem4h's youtube channel, he shows the v2 bucking off. Planning on gettng one soon Quote Link to post Share on other sites
Isamu Posted December 7, 2012 Report Share Posted December 7, 2012 Thanks, will have a look Quote Link to post Share on other sites
dazdarren Posted December 7, 2012 Report Share Posted December 7, 2012 Glad to help! Quote Link to post Share on other sites
Isamu Posted December 9, 2012 Report Share Posted December 9, 2012 News news! I have just come from this mornings game aaaaaaaand, the problem persists, with the last setup I comented before, the problem is still there, the bucking doesnt affect the BB, maybe a little, but range is roughly 20m, quite straight to be honest, but thats not a feat at that range using 0.28gs. I will think this over and have a look at the bucking itself and see if it is horribly dirty or has anydefect I didnt spot before. I had high hopes in this, but seems like it is dissapointing me, the rubber or my limited technical skills, that is Quote Link to post Share on other sites
Wild_XIII Posted December 9, 2012 Report Share Posted December 9, 2012 I've noticed that the one I fitted to my XDM is quite like that, it takes a few "warm up shots" before you get any hop at all! Quote Link to post Share on other sites
dazdarren Posted December 10, 2012 Report Share Posted December 10, 2012 What boobie did was wrap heatshrink around the hop-up adjustment arm, which might solve your problems Quote Link to post Share on other sites
Isamu Posted December 10, 2012 Report Share Posted December 10, 2012 What boobie did was wrap heatshrink around the hop-up adjustment arm, which might solve your problems Sorry, I dont quite understand that fix dazdarren... have you got a pic? Thanks Now that I think a bit about it, 028g had this issue, but I managed to shoot some 0.20gs and they seemed to take the hop better, both were washed and from the same brand, devil bio BBs weird :S Quote Link to post Share on other sites
dazdarren Posted December 10, 2012 Report Share Posted December 10, 2012 sorry I dont have a pic. But starting from 3:40 on this video, it shows you what you could do. http://www.youtube.com/watch?v=YOxpUpdhsF0 Quote Link to post Share on other sites
Isamu Posted December 10, 2012 Report Share Posted December 10, 2012 Oh, you meant for the GBB version... I dont think It can be done with an AEG hop up though. I had a look to the rubber yesterday, cleaned it and slightly sanded the "bump" hoping it will improve the "grip" on the bbs. It looked a bit dirty and had some silicone residue so I expect it to work better next time, although im putting it on hold for sometime BTW: my two bucking had a slight concave shape, so are they a V2? Quote Link to post Share on other sites
dazdarren Posted December 10, 2012 Report Share Posted December 10, 2012 Oh im sorry! maybe make a thicker nub? Haha I'm not sure Your buckings may be v2! Quote Link to post Share on other sites
Isamu Posted December 10, 2012 Report Share Posted December 10, 2012 Thought about it when I installed a madbull nub, it is like a regular nub but "fatter" so it can make the bump protude more into the barrel window, but I decided to change it in the last minute for a stock ICS, much slimmer but I dont think it affected performance, the iCS with the hop almost at maximum blocked the bbs into the chamber so I dont think a thicker nub is the solution... Have to keep thinking about it though Quote Link to post Share on other sites
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