Re: Differences in 7.62 lowers?
KAC, LMT, LaRue, and Mega are all angled cut and I believe they will all work. There was a bug MATEN thread on arf, and someone used a mega lower on a LaRue OBR upper and it functioned fine. All 4 of those brands are angle cut.
CMMG, DPMS, and I know of one...