ProWin CNC Aluminum Hopup Chamber for P90 / E90 Series Airsoft AEG SMG's

"I have had great success using TM parts in this hop up with a Prometheus purple. Has a noticeable effect on range and consistency of shots. No it doesn't raise fps, that's not important or how hop up chambers work. That's your bucking barrel and nozzle and other compression parts. As long as it's one piece, a chamber is more about locking in a hop setting and not walking over time. This qualifies.

My only complaint is that the area where the barrel clip sets in is curved instead of squared so I had to dremmel my clip to fit. This was true for both a TM clip and a CYMA.

"great little Hop-up unit, bought it to replace my factory plastic one.

I was however a little bummed to find out no other pieces where included other than the hop up arm pin. i had to use the old adjustment wheel and arm.

it is an excellent built up grade part, finish is excellent. after putting it together and installing it i notice a slight bump in efficiency and FPS, along with my promy 6.03 barrel, lonex 70d it shoots lasers.

I only wish it included the black hardware.

over all i suggest getting it.

"Got one of these in October of '20 to upgrade the performance on my P90 (Cybergun version). I've had nothing but issues with the gun since. Very inconsistent velocities, from 180-360, won't go above 280 now, plus occasional feeding skips. Might just be a bad unit but after I dropped the stock hop up back in it started to fire a lot more consistently.