I just had the pleasure of reading “AR Upper Quick Fixes: Match Bolt Carriers” by Joe Carlos in the May 2014 issue of American Gunsmith. I want you to know how much I appreciate you mentioning our staking tool. Very kind of you!

Really interesting to read about your work. Your experience with ARs certainly goes back and your article is proof of your great expertise. Your mention of harmonics and how different carriers, lube, and bullet seating with affect accuracy are truly noteworthy, something I’ve heard of but never known a whole lot about until now. Nicely done!

My sincere thanks again, Joe. Please let us know how we can help with future articles and projects.

Frank R. Brownell
Brownells.com