Reliability to max - Adams Arms Standard Picatinny Block Piston Kit

This great product very reliable shoots great and feels smooth... instal is a little confusing but YouTube walk you threw it. I have used this on my 7.62x39 with no issues as well.... the negative my original barrel gas block shoulder measured a tiny bit to far for the rod, we’re talking less than 1/16” which caused a world problems binding and such... new barrel works great no issues 800rds.