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Pre-Order ETA April 2024 Prometheus Air Seal Chamber Hop-Up Bucking For Airsoft AEGs (Model: 50 Degrees)

40 Customer Reviews

by brandon a. on 06/17/2019
"I have a heavily upgraded Well L96 with CA AEG barrel conversion that I put this on.

It hops .4's very consistently and if I increase hop all the way I get a massive upwards curve so I have plenty of room to increase weight.

Fantastically accurate and consistent.
by John F. on 03/12/2019
"Best bucking on the market in my opinion
by Felipe E. on 09/05/2018
"Purchased this bucking for my KWA RM4a1 ERG for a flat hop mod as it came recommend by many and the original bucking was pretty bad could barely get .30's to go beyond 50 yards. The bucking is tough although it says soft it hard to cut and works great for what I needed it for, I highly recommend it...also installed it on my brothers M249 without moding it, simple R & I and it made a big difference in the consistency and range of the gun.
by Connor M. on 07/06/2018
"Bought this to go with a lonex 6.03mm barrel and a kwa hop-up. It was to tight for that combination so I put it on another gun and works great.
by Zachary W. on 05/22/2017
"I was building a dmr from a m4 using HPA system. I learn early HPA like hard bucking. My gun was shooting shorter than I liked at 355fps chrono on .32 gram legel for HPA. I shoot .40gram and it was short range and less accurate than I wanted. Plus my air psi was max on my system. Needless to say did not like that.

So I try this bucking with a flat hop. Started pegging soda cans 80 yards 10 for 10. PSI can down giving me more FPS play.
I was going to try it with a R-hop next.
by Zeb Z. on 04/29/2017
"Works great and worth every penny.
by Tommy U. on 04/04/2017
"Great so far! Easy to cut down the ridge for flat hopping, and sturdy enough when trying to reinstall. I was pretty hard on this thing when trying to get a tight air seal (tooth floss mod) and it didn't rip or tear. Noticeable improvement to consistency and range.

Installed on KWA KM16br with Namazu bucking.
by David B. on 03/19/2017
"Great bucking for flat hopping! Unfortunately, put a hole in mine when I was sanding down the ridge. Definitely recommend buying it.
by Meredith P. on 03/05/2017
"I bought this bucking to test against 2 other buckings, the other buckings were a prommy blue, and the modify ryusoku flat hop bucking. After flat hopping the prrommy purple, using surgical scissors and an emory board, the prommy purple outranges the other two by around 25 yds and is far more accurate.
by Donovan D. on 07/15/2016
"By far the best performing bucking on the market. BY FAR.

The G&G Green is a close second, and probably a better choice for those on a budget.

Yahs.
by Matthias R. on 03/02/2016
"Sweet thing! Pretty awesome! Get it! I'm not sure how long it will last but it seems pretty high-quality (c'mon I mean it's Laylax/Prommy, how can you get better than that?
by Christian L. on 04/14/2015
"*All resultant figures derived from testing in a Classic army M24, m 160 spring, madbull 6.01 x 509 barrel, velocity test with .2 gram Tokyo Marui bb's, accuracy test with .43 gram Madbull "match" bb's

Fit: It is a bit thicker than a standard bucking. It fit pretty snug with a bit of force applied to seat it correctly in my M24 hop up unit. As far as an AEG unit goes, it might need a little boring out of the inner diameter and or a lot of silicone

Hop: Just right! Set at about 70% hop, a .43 gram bb flies true. This bucking is meant to hop heavy bb's, even at minimum values, a .2 climbs like a rocket out of the muzzle

FPS Boost: the seal is phenomenal and increased my FPS by an average of 24 fps
(Vsub 1: 510 fps w/ marui .2 gram, Vsub 2: 534 fps w/ marui .2, all other variables held constant)

Accuracy: All technical jargon aside, come on, it's a Promy, it screams accuracy.
In an indoor environment with no wind, this bucking, a madbull .43 gram "match" bb and a madbull 6.01 x 509 mm barrel, a 7.15 inch grouping was achieved at exactly 200 feet. (These results have been repeated consistently in the same environment under the same condition

Conclusion: This bucking works extremely well. It does what its supposed to and carries the legendary Prometheus performance and quality. If you're the player that fine tunes your rifle and you need something that will accurately hop a heavy bb a long way, buy it.
by Caleb C. on 04/09/2015
"Great air seal and hopup nub it increased my fps by10 even though it was a little overpriced it was worth it!
by justin s. on 04/26/2014
"This is a 20$ bucking and let me tell you its well worth it!
I put this into my SVD and now it throws .30g bbs like nothing.
by Brian G. on 02/24/2014
"Before you read this, I'm not too knowledgeable on parts for AEGs yet. I'm just giving an honest, unbiased review on THIS product. No comparisons.

I bought this as a replacement for the Bucking my Madbull Ultimate Hop-Up Unit came with. It wasn't really working right for me, it kept losing it's seal still after checking the space between the Hop-Up System and Gearbox, so I looked to other Buckings.

I decided to look at Prometheus, since I heard they keep pretty good seals. I'm not disappointed. The FPS stayed pretty consistent, averaging between 3 to 10 FPS of a difference. Not to mention it beefed up the FPS a bit as well. The nub for the Hop-Up arm is pretty great too, doesn't place more pressure on the Bucking than it needs too, allowing for pretty accurate tweaking on the Hop-Up.

For a Soft Type Bucking, this does a pretty good job. I'm going to keep using it until I try the Hard Type from Prometheus.

Pros:
Keeps a great seal.
Nub allows for good precision tweaks on Hop-Up.
Increases FPS and FPS Consistency

Cons:
A little over priced by a few bucks.