Since I am a builder I have NEVER bought a Ar-15 ffl lower. I use Tactical Machine in florida that are pre-anodized.
I recently built a AR(LR)-308 with a blitzkrieg 80% lower, I borrowed a jig. My upper is a DPMS 16 " from midway with the AR-308 FCG , mags come from dpms 4rd & 10rd, 4rd for hunting. This will be my deer rifle for the everglades this year for now I have a Elcan on top a rugged scope for those long buggy rides,
last deer season( see pic) I used a ar-15 carbine with fixed stock and aimpoint on top, using TSX Barnes 72gr copper projectiles, regardless of the reviving reviews, I felt under powered