Re: Which piston, LWRCI, POF, Sig556, FN 16S, ACR, LMT
I have LWRC M6A3 5.56 and it's a great gun. Coating is NiCorr which makes it impervious to elements and wear, increases lubricity. No failures after 600 rounds, but others have reported 5 to 10k without cleaning which makes it a great...