There was a thread 4 years ago on this topic but no one had experience with them at the time.  I need some left-handed BCGs for 5.56 and Prime Weaponry has them for about half the price as Stag.  I ordered one and the fit and finish was beautiful.  Hopefully I'll get it to the range this week in a new pistol I just completed.  Even so, I need more and would love to get more feedback before throwing them more money.

Anyone else using their products?  Even right-handed if that's all the feedback I can get, but I'd like to hear experience with their left-handed BCGs.

Well, I got to use my Primary Weaponry left-handed BCG today.  It worked perfectly.  I had to use it in two left-handed pistols because the others hadn't yet arrived.  Guess what was waiting when I got home?  5 more left-handed Primary Weaponry BCGs.  I should have stopped by home before I went to the range.

In any case, the one BCG worked fantastic in testing function on two new pistol builds.

I don't know why but one pistol yielded a tight pile (inside of 3 feet) of ejected brass to the left and just behind me.  The other gun, all the same parts, delivered in the same package as the parts in the first gun, made a tight pile to the left mostly straight out, maybe just slightly forward.

I'm pretty happy with the results and am anxious now to get a few hundred more rounds in the first and in this new batch of BCGs.

Brownells has some on sale, so I am going to order one