Bore view of the 4UAD AEG bucking showing the single-point flat nub and alignment tab inside

4UANTUM Friction Pro bucking installed over the window of a stainless AEG inner barrel

4UANTUM Friction Pro Bucking for AEG

€11.00 EUR

Tax included. Shipping calculated at checkout.

Shipping worldwide from EU

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Pairs well with:

1x AEG bucking
1x soft nub

Worldwide shipping starts at 7.90€ and is calculated during checkout based on location.

Orders are usually fulfilled in 1-2 business days and are shipped from our warehouse in Netherlands.

⚠ Duties may apply if you're based outside EU economic zone

→ Single-point flat nub
→ Lifts up to 0.48g BB's
→ 60D Hardness

New bucking made by 4UAD, experts in doing comprehensive testing on airsoft replicas. Made to be compatible with most Tokyo Marui spec inner barrels and chambers.

Soft nub included with every bucking.

⟵ Back to SSR4 / SSR15 Upgrades

Customers praised this airsoft bucking for delivering "incredible accuracy" and "insane accuracy and distance." Reviewers noted it "shoots straight as an arrow" with ranges up to 80m. A key benefit highlighted: it works with stock barrels unlike competitors, making it ideal for budget builds. Effective with mid-weight BBs (0.32-0.4g). One review notes best results with 0.32/0.36 BBs.

5 stars: 7 (88%)
4 stars: 1 (13%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

improved BB stability and range, also in winter.

On fully tuned SAEG M4, switched the begadi fly 5 to 4uantum
bucking, and it shoot (50m) straight as an arrow, max range 80m. Best upgrade.

M115 spring, 1.78 Joule with 0.32gr BBs
Maple leaf innerbarrel 370mm,6.02mm
4uantum bucking aeg with an old begadi cnc rotary hop up unit.

great product from 4UAD

it's a great product in general, but I'd like to highlight, that it allows you to have get great results with your original inner barrel. most great buckings (like the ML super macaron, or some Begadi ones) have wider contact patch than the window on your average inner barrel (they don't fit basically), so in order to get great results, you need to replace the barrel as well. thats not the case with the friction pro, I've tried it in an absolute low-end double eagle replica (everything remained stock except the bucking) and i've got outstanding results. it can be a game-changer for cheaper builds!

Bastant precisa. Bona goma.

Estic content amb el resultat.

Excellent accuracy

This bucking was installed in my mtw and has given incredible accuracy over the previous buckings I have used over the last couple of years. Very impressed with it!

works fine for me

Great bucking

Works great with middle weights bbs like 0.32 ans 0.36

Amazing

Grate product has insane accuracy and distance.

Range

The bucking is really nice for the cost i get a 60m effective range (1 out of 3 will hit a torso size target) on .32 and 1.5J and a 70/80m effective range (1 out of 3 will hit a torso size target) on .4 and 2.3J
Set up is
V2 Kythera
4UANTUM bucking and nub
ML 6.02 370mm barrel
and Promi hop-up

It can 100% be better with a nicer hop up like Silent Arms one and a better barrel like 6.05 PDI

Compared to the stock bucking that is on the last gen Wolverine MTW, will it be better for long distance use with 0.40g BBs with limit of 400fps?

TRIDOS.DESIGN

Measuring bucking performance objectively is an extremely complicated topic in airsoft in our opinion due to the many variables involved. Regarding your question - we have seen positive feedback from MTW users for this bucking but we always reccommend to do your own testing and see how it performs on your exact setup.

Hello Tridos Team,

I have to question about the bucking:
1- ¿It's compatible and works well with PDI barrel?
2- ¿It's a good option with 300 fps limit?

Regards.

TRIDOS.DESIGN

It would be best to reach out with these questions directly to the manufacturer 4UAD Smart Airsoft. They will be much more experienced to answer this regarding their product.

Kan deze ook in een Maxx hop up gebruik worden in specna arms aeg ?

TRIDOS.DESIGN

This is a TM-spec AEG bucking so it should work in pretty much any standard M4 AEG hopup chamber / replica / outer barrel. There can be exceptions but Maxx chambers are compatible with most buckings on the market.

4UANTUM Friction Pro Bucking for AEG

Pairs well with:

→ Single-point flat nub→ Lifts up to 0.48g BB's→ 60D Hardness

→ Single-point flat nub
→ Lifts up to 0.48g BB's
→ 60D Hardness