“Research Toolcraft, they are a quality outfit with fit and finish never an issue (YMMV). This 9mm BCG slipped into my recent AR9 pistol build and functioned flawlessly for over 500 rounds in a break-in session using Glock mags. Sounded like I was running a sewing machine and stitching holes at 50 yards. 115 grain white box, grey box and steel cased no issue. Going to work it in with anther 500 rounds of 115 grain before moving on to higher grain hollow point HD rounds. Thank You Arm or Ally!”
“Arm or Ally was awesome, fast shipping, good customer service! Although my bolt came to me galled on the faux gas key and "un staked" that wasn't their fault and they put me promptly in contact with Toolcraft and I am awaiting a replacement. Kudos Arm or Ally!!!”
