A+ Studio Hop Up Rubber

[Asteriz1977]

Link: http://www.acmgear.com/advanced_sear...s=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.
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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.
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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.
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[Rabbit]

Really appreciate the indepth review - I and a few teammates were considering this product.

A+ Asteriz.

[Stealth]

I think what I'd like to see is the difference between a well-tuned, well-sealing "conventional" setup put up against the A+ setup.

The increase in FPS between the stock setup and the A+ setup may be as a result of an air leak between the nozzle and the hop-up rubber.

We'd do a review, but people would just think we were biased. . .

[ImpactBlue]

I have it installed in my A&K Masada and the distances I've been getting have been incredible, a very noticeable difference over the stock hopup rubber. I may even swap out the Modified hopup rubber I have in my VFC 416 with the A+ studios, I've been very happy with the results.

[Fuzzy]

I installed the Reaps in my G&P aeg. The original hopup was the madbull red in a prowin hopup chamber. I have a noticeable increase in range after switching to the Reaps. I would say at least 20 ft more of a flat trajectory using 0.28 bb.

I didnt experience any change in fps. I am shooting at 380 fps using 0.20

I like it enough that I will be changing all my guns, gas and aeg, over to reaps.

[unknownvariable]

Originally Posted by Stealth

The increase in FPS between the stock setup and the A+ setup may be as a result of an air leak between the nozzle and the hop-up rubber.

And if that is the case, there is still a benefit to the purchase.

For the sake of simplicity/effort, I still appreciated the stock vs upgrade comparison. Sure more tests could be done but isn't that always the case?

Anyways, I have heard good things about them. I have a few on the way to try out. In general they are pretty inexpensive compared to some of the others out on the market.

[Stealth]

Originally Posted by unknownvariable

And if that is the case, there is still a benefit to the purchase.

Yes and no. The quality of air seal will depend on the nozzle/rubber pairing. OP's setup lucked out, I've heard of fps losses on the A+ rubber. It's a shame really, that some users aren't able to ensure and verify a good seal and therefore give a more indicative review.

As CDN_Stalker said it best: trying to keep track of what rubbers work best with which nozzles with a new one coming out every week is becoming impossible. Your mileage will always vary.

But I totally agree that the curvature of the mound is miles ahead of the any hop-up rubber with a standard mound.

[unknownvariable]

Well, my point was for him, he got an improvement and if it was because of a better seal then great. I am sure everyone would take such a review (and probably all of them) with a grain of salt and a "your mileage may vary" caveat.

[TPM001]

I tried the A+ hop up rubber for both AEG and GBB (i.e. VSR-10 compatible). I agree with the others. Definitely a noticeable extension in the distance the BB travels before it drops. I didn't notice an fps increase tho.

[Rabbit]

http://www.airsoftparts.ca/store2/in...oducts_id=2384

Airsoftparts.ca states you're using the wrong rubber because you're below 420fps.

What's the dilly yo?

I wonder if this had any effect on your results.

[venture]

I have seen (as stalker says "a new hopup every week") so many ideas come and go for hopup buckings that I marvel that they even try.

The original TM hopup bucking is simply one of the best to this day. If the Chinese could duplicate the rubber quality then maybe they could make a hopup that performs like a Marui hopup.

I fondly remember outshooting upgraded Chinese guns with my TM MP5K PDW shooting 280 fps! The stock TM hopup would just fling those bbs laser straight out of that 141mm barrel. They would fly perfectly level until all energy was dissipated.

These new 12 and 14 dollar buckings may be equal to a Marui (MAY BE) but I doubt they are any better. You can get genuine Marui buckings for under $10.

[Moonschlagen]

Originally Posted by venture

I have seen (as stalker says "a new hopup every week") so many ideas come and go for hopup buckings that I marvel that they even try.

The original TM hopup bucking is simply one of the best to this day. If the Chinese could duplicate the rubber quality then maybe they could make a hopup that performs like a Marui hopup.

I fondly remember outshooting upgraded Chinese guns with my TM MP5K PDW shooting 280 fps! The stock TM hopup would just fling those bbs laser straight out of that 141mm barrel. They would fly perfectly level until all energy was dissipated.

These new 12 and 14 dollar buckings may be equal to a Marui (MAY BE) but I doubt they are any better. You can get genuine Marui buckings for under $10.

Yeah they are great for lower power AEG's but I've heard they actually start wearing out once you go past 350fps.

BTW, if someone is looking for the ultimate hopup, you can't beat the R-Hop setup.

[Warlock]

Originally Posted by venture

The original TM hopup bucking is simply one of the best to this day. If the Chinese could duplicate the rubber quality then maybe they could make a hopup that performs like a Marui hopup.

That is the reason I would recommend a Japan made hop-up bucking over a chinese or taiwan made. The quality of rubber and consistency is a big difference.

For me, Prommy, systema, firefly or PDI should be the best choice. (all made in japan)

Marui is good for low velocity.

I still prefer conventionnal Hop design like systema or prommy over PDI (W) or Firefly v-hop that requires a special firefly nub and also V-hop are picky on adjustement and fitment. SCS nub is also hit and miss.

R-hop is only a patch and I don't see any design improvement.

sometime, new design are only marketing (or money pit) and created to make you spend your money.

[CR0M]

Originally Posted by venture

I have seen (as stalker says "a new hopup every week") so many ideas come and go for hopup buckings that I marvel that they even try.

The original TM hopup bucking is simply one of the best to this day. If the Chinese could duplicate the rubber quality then maybe they could make a hopup that performs like a Marui hopup.

that explains alot to me, to this day I never understood how My stock tm m16 got the distance it did...

another thing, everyone probably does this already, I dont know, I know remy did this before too, but I put teflon tape around the bottom of the rubber... it increased my fps by like 15-20...

[ScooterVauto]

I have had quite a few favorable results with the A+ hop up rubbers.
off the top - Moon's and Impact's aegs .

I rebuilt another player's ICS
prior to working the front end I had rebuilt the Lower and the Upper mechboxes.
with stock front end (300mm inner) - 20wt devils 342 – 349 FPS.

R&R the inner with a new 363mm Prometheus TTB & AN A+ 60%.
20wt devils Zero hop up = 379 – 383 FPS and 376 – 378 with full hop up.

it took about 400 shots at full hop up before it settled into a good position then
at the max setting 28 wtbb started lifting HUGE, he dialed it back to about 70% of max and
"IT FN DANGEROUS out past 200 feet" his words.

that said.. I yanked the one out of my VSR (stock TM hopup chamber down a 554mm PDI) and put a nineball back in .