I have a PSA pistol upper (10.5), with almost a 1k rnds through it. no issues...... I have 2 BCA carbines with a few hundred rounds each, and no issues.... steel and brass cased on all.....I've seen 4 or 5 other than mine pop up in the past week here and on other forums but it depends on price range. PSA and bca will ship you one new for 350 all day. If you ask some people "they are just as good as colt or geissele"