Reviews: ProWin CNC Hopup Chamber for M4/M16 Series Airsoft AEG Rifles


15 Customer Reviews
Model: HU-PW-M4
Location: 7-8-00-3-1 Y6-M09 U10-M08

Displaying 1 to 12 (of 15 reviews)

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by Kathleen M. on 2015-10-22 12:11:29
"Decent hop up chamber; range and accuracy is great with a Guarder 70% bucking and a Angel Custom H Nub. The machining and finish are of great quality, but not nearly as good as the Retro Arms Hop Up chamber. This unit is good, but personally I think the Retro Arms unit is of better quality and more durable.
by Brendan T. on 2015-08-28 21:12:50
"I can't really give it an accurate rating due to the fact that it absolutely will not fit in a kwa but ill give it the benefit of the doubt based on my friends time with it. I learned that the hard way. Don't waste your time or money if you plan on getting this for a kwa.
by Jacob O. on 2015-07-10 20:23:30
"The adjustments are great super fine and stay where put but I bought three different buckings and third one is the only one that wouldn't leak so do some looking for the right bucking and this hop up will be as great as it should be
by Chris H. on 2015-07-02 21:54:36
"absolutely amazing hopup. really easy to install. super easy to flat/R-HOP. just use a quality bucking and barrel and you should have great results. not much else to say.
pro: easy install.
easy flat/r hop mod.

by Rick F. on 2015-06-18 16:57:18
"Great Hop up, easy to assemble and install and with maple leaf 75* bucking and h nub ranges to 200 ft with superb accuracy and even 250 if needed. One word of caution, as i found out when it was not feeding right, on certain barrels and certain combos the maple leaf bucking lip sticks out barely into the feed tube and can cause jams, but rarely and just need to file the barrel down so the lip sits slightly farther back. Great Hop up!
by Ryan S. on 2015-06-08 20:33:32
"the over all look is great love the blue but the hop-up itself sucks, i put it in my G&G combat machine and it would not even shoot. it would feed but not even shoot if it did shoot it would just fall right out the barrel if you get this hop-up dont put it together and just send it back and get your money back. I was really happy to get it at first and i read the reviews and it sounded good but dont waste your money. and get a better hop-up
by Michael B. on 2015-04-22 15:12:25
"Whereas it says for M4 series AEGs, this absolutely will not fit in an Apex R5 M12. It may fit other Airsoft M4, but it will not fit the Apex I have.
by matthew b. on 2015-01-18 17:29:47
"Very few products work so well I can't imagine what I did before you had one. The ProWin hop up was easy to assemble, and out shined my stock G&P hop with the 3 gear system, first mag fired following install. With almost no adjustment, this hopup delivers BB's consistently on target. It's expensive and it's fricken blue..and people might tell you that a standard hop works just fine, why spend the money. (well, some people anyway) But this thing fricken works. I went from flinging BB's 30-40ft before they split off the plan and did their own thing, to mowing down fools at or beyond 100ft before having to worry about the shots losing energy and breaking out or dropping off. Just got back from a full day of at the field, very successful upgrade. If you're wanting an upgrade you don't have to mess with, just works, increases range and accuracy and doesn't require re-adjustment during, or after each this. It's fricken blue, and it's expensive, and anyone with an M4 should have one.

-My rifle:
G&P Evike Rapid Fire II
Angel Custom hop up nub
G&P 60deg bucking
stock barrel
by Matthew H. on 2015-01-05 15:01:32
"This hopup performs flawlessly. I purchased it when I noticed that the stock hopup for my Lonex m4 seemed to apply pretty inconsistent hop. This thing is light years ahead of the standard gear design. The rotary design of this unit stays in place very well, and its application of hop is much more predictable and gradual than any other unit I've used. Unfortunately, the unit did not sit as far forward as my original hopup, so it was constantly missfeeding when I purchased it. Finally, I simply installed a small o-ring onto the back of the unit, and it now feeds perfectly.

CNC design (no air leaks)
Anodized finish
Rotary design for much more consistent and predictable application

A little pricey
Was not really a drop-in upgrade like other units I've used
by Roland B. on 2014-10-16 11:44:09
"This is a great hop up system. Extremely accurate my m4 s system is dead on now. However I must note it's compatibility that when my gear box shattered I replaced it with a dboys one and the gun would either not fire double feed or compression would be awful. The key to making it work with a dboys gearbox is to attach a metal washer around the hop up lip that goes into the gearbox that way the air nozzle is at the perfect length for feeding compression and this function flawless. Upon doing this I've never had a misfeed or jam. My accuracy even at 200 ft is spot on 9/10 shots. Buy this angel customs 6.01 tight bore and maple leaf hop up and flat hop it and you'll see what I'm talking about
by Christian S. on 2014-07-13 14:04:14
"I just recieved this hop up chamer and my g*d, the feel and look of it is 100%.
When i recieved it i got all the parts needed to assemble it, even though its spesificly written that theese do not come with it, just the hop up unit itself. Assembly is straight forward and took no more than a coupple of minutes at most.

When i fire the gun however it doubble feeds on every other shot i take, but this i think is the air nozzle and not the hop up unit itself, so ill order up a new nozzle and test it out.


CNC - built like a tank
Great looking, nice colour that adds a bit of bling
Came with all the part to assemble it (O-ring, wheel, you name it)


None that i can see right away exept for the gun doubble feeds (but i dont think the unit is responsible for this)

all in all i would say this is a pretty nice hop up chamber and would recomend it to others to buy
by John H. on 2014-01-14 18:49:59
"I have already reviewed this, but I wanted to add that it works with a Maple leaf 75 degree bucking, nub and an angel customs 6.01 barrel.

I also recommend 5.98 max precision BB's at .25 grams

Displaying 1 to 12 (of 15 reviews)

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