4UAD SmartAirsoft 4UANTUM Friction Pro High-Performance Bucking for Airsoft AEGs

"Works great, easy upgrade, worth it. I'm shooting lasers now.

"One of the best buckings I've tried. I won't say its the only one you should ever get as hop performance for specific buckings is reliant on the barrel, chamber setup. It is however worth buying a few and trying them to compare ot other setups. It is only beat by my UA R-hop barrel, so it's definitely worth a shot in your build.

"Holy cow, this bucking is amazing. I installed to of them into 2 gen 3 lancer tacticals (these guns only have a 200mm inner barrel btw). Immediately after installing, the groupings on both guns went from meh to jaw dropping. As for range, I didn't see a lot of gain, but the tiny inner barrel probably affect that. Overall 10/10 will be buying again.

"Great bucking and nub combo, installs and fits great, good durability and consistency! I haven’t compared to other buckings outside of the stock parts that these replaced, but I see no reason to try anything else

"My BBs disappear into the horizon, so I don't know how far I can go with it, but I know its more than 250 feet shooting 0.32g.

Stock E&L AK74 with this bucking and a Lambda 469mm barrel fires absolute lasers. My chrono results were 1J without variation some days ago with 0.32g bio Evike Tracers. I kept the stock hop unit.

However the initial few bbs were really wonky, like 0.7 to 0.9J, but after a few tens of BBs it dialed in.

Very happy with these results so far.

"I have a Arcturus AK12PE first Gen. I upgraded the hopup unit to the gen2 version and installed this bucking with a lambda smart .03 barrel. My hope was to shoot with .30bbs so I initially tested with 30s and bbs didn't go past 20 feet. Once I dropped down to .25 this bucking was shooting lasers and with great distance with hop still dialed at 0. Ive yet to try it with .28s but sofar with .25bbs I'm more than satisfied.

"Ive done R-hop, flat hop mods, etc.

To have something as a plug n play with the same results is astounding. This rubber is great and i am getting great range.

My build is a 15” Arcturus with a stock barrel (6.02) and lancer CNC hop up unit. I was having feeding issues with the lancer unit and some other bucking’s ( prommy purple worked great).

Im shooting at 1.45 -/+ 2fps on .20g using either .30g or .28g depending on, and I’m easily hitting an 6” circular target at 170ft about half the time.

It was never meant to be a DMR, and it isn’t but i am considering a x3 flip over magnifier

Overall the worst case scenario is you spend $12. But for me these are the only bucking i will be using now.

"Haven't had a misfeed since installing this. Super accurate. Feels high quality. Very accurate (although, my testing has been rather limited). I appreciate that there's no guess work on which "degree" to go with. You just buy this thing and it works. Can't see a reason I'd go with anything else.

"I like this better than maple leaf tbh. It's a bit softer I think, which makes it spin the heaver bbs better. Also works great with rhop and flat

"This bucking is nuts on crack! I'm recommending to all my friends. Dropped into my modded lancer and it's just good on initial install. Shooting lasers basically no readjustments after initial install. No lapping on the inlet needed. Just, amazing. Good bye maple leaf!

"The best bucking for literally any scenario. better than any other bucking out ther no doubt about it

"THIS BUCKING IS AMAZING. This is the only bucking I will ever use from here on out for all of my builds. I have it in my specna m4,JG ak74u, vfc scar H, cyma mp5,and my TM m14. Sure you could go and spend your money on a promy ewww (Prometheus blue). Or you can save some money and get this wonderful bucking.

"Works pretty well but I haven't it very long. We will see how it goes, but so far so good.

"I used before only maple leaf buckings - Super, Macaron, Mr. hop. And could say that this buckings are much better, more accurate, more convenient and I can use the different bbs without changing bucking, forget about 60,70,80 degrees.

"wanted to right another review after I put this bucking in more of my guns, it has slightly longer reach that a maple leaf bucking, thats with the same weight ammo, but I have noticed that this hop up in particular seems to be more "finicky" than a maple leaf. I have never had a problem with a maple leaf hop up bucking, you just put them in and boom, you now have tons of range. with the 4uad I have noticed a problem with some rifles the bbs will usuallly curve left or right, usually at longer distances. it can get frustating when on another gun with the 4uad bucking it shoots straight as an arrow. there are so many varaibles when it comes the actualy hop up unit and inner barrel that you will go crazy trying to nail down the cause. the simple solution is to simply twist your inner barrel either left or right until you shots go straight. ignore the clip for the inner barrel, I mean leave it in, but its not the end all be all especially if your shots are curving hard right. after that then will see what this hop up is capable of and oh man, its incredible, this is now my go to hop up. still full stars