This was my first piston upper. I tried to do as much research as possible. I am so happy with this upper, it functions amazingly!! Being able to turn the gas off and have it not cycle is one thing I love! I shoot suppressed half the time at least and it is super smooth and quiet operation!! I hope this company comes out with a 300 blackout C.A.P.S upper with a short barrel, that will be an instant buy for me!!!
Reviewed by: Andrew J. from Gresham, OR on 4/11/2016