I recently purchased a LMT complete lower. The lower has not yet been fired, but I did slap an upper on it to make sure everything was working. I’ve noticed a few issues that I have not noticed with any of the other lowers I’ve dealt with/owned (RRAs, LWRC, and USGI Colts). I’m starting to worry I got a bad or slightly out of spec lower.
First, the mag well is a little tight. Closer inspection of the mag well reveals several slightly raised rough spots where the finish is starting to flake off. Pmags (with the exception of one old one) will not drop. USGI and H&K mags drop fine. I'm not sure if the pmags are hanging on the rough spots in the mag well, but I feel like the finish should not be chipping on a new lower.
The second issue is that it seems to have an unreliable “two stage” bolt catch/release. The bolt does not always lock back on an empty chamber when the charging handle is pulled. After removing the upper, I noticed that something with the bolt catch is hanging, preventing the mag follower from lifting it. This mostly happens with pmags. As far as the "two stage"-ness, when I try to release the bolt with a magazine in, the bolt catch creeps and hangs a little before finally dropping the bolt. It feels like the release somehow is hanging on the mag, but I can’t really see what’s going on. This happens with all mags. I suspect the two issues are related
Also, unless you flick the thing pretty good, the safety selector will sometimes hang between safe and fire. Not as much snap to it as I'm used to. Maybe a weak spring? Not a major issue, but I thought I'd mention it.
Anyway, like I said, I’ve never really run into these issues before, even with a brand new lower. I was wondering what you guys thought. Does this sound like an RMA or does the lower just need some break in? I’m not sure what to do here.
edited to make more sense