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ProWin Hopup Chamber for M4/M16 Series Airsoft AEG Rifles
[HU-PW-M4]
$29.99
by Austin L. Date Added: Saturday 08 June, 2013
I had nothing but problems with this hop up chamber. Every time I tried to shoot it would double or triple feed. I tried different magazines, different BBs, different buckings, different barrels, and different spacers, but it would always double and triple feed. I heard these were supposed to be the best, so maybe I just got a bad one.

Pros
CNC aluminum
Lightweight
Comes with all parts need for a chamber
Precision dialing

Cons
Double and triple feeds
Uses a screw instead of a spring to seat properly

Rating: 2 of 5 Stars! [2 of 5 Stars!]
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