I have a DPMS LR308B. I really like it, and it's good for about 3/4 MOA. I've been having problems with the bolt catch holding the bolt back on an empty mag. It also is often difficult or impossible to convince it to hold the bolt back even when doing it by hand. I've replaced the bolt catch once, without improvement. Has anyone gone with an aftermarket BCG? I'm wondering if that would be my answer.