I have used quite a few stripped different lowers, so I will just jot down a few things about each:
RRA: Old RRA lower with the old logo. The safety doesn't fit quite right, and has been beating up the selector stop tabs. Other than that, it works fine.
CMMG Inc: Non blem lower was perfect, and everything lined up without any issues. Anodizing was perfect and has a slick feel to it. I used it as a basis for an SBR. I did get a blem lower, and did a little work to the mag well so that GI mags will function and drop free. Not going to do any more work just to get P-mags drop.
TOS non-billet stripped lower: Bought one on sale several years ago for $99. Fit was perfect, but the finish ,while durable and even, wasn't slick like the CMMG. I used it as the base for another SBR and it has been flawless.
Double Star: Have used a few of these over the years, and when they first came out, they were a nice choice as far as things go. No stupid panther, not cast, and all in spec. Finish was nice and slick. Still have one with a 20" FN A2 on it. Still love the A2.
Noveske Gen 1 Blem: Best deal I ever got on a stripped lower. Got it free a few years ago when I ordered an upper from them. The only blemish was a small nick in the mag well fence. hardly noticeable, and something that Colt wouldn't even blink at. the anodizing on this lower is perfect, and smooth. Currently waiting on a F1 to finish it as another SBR.
Thoughts on others that I've never owned, but have handled quite a bit:
DPMS: Crap. Never liked the way they felt. Always seemed to have a rough finish and never felt like a quality piece. and yeam the logo doesn't mean much, but please... I'd take the dueling cocks over that stupid panther any day.
BM: Acceptable. But in today's market, just don't see spending my money on them.
Armalite: Same as BM.
Also had an Ameetec Arms stripped lower when they came out, and to that point, they were the nicest stripped lowers that were available at the time. Too bad they ended up screwing themselves. Anyone ever hear what really went down with them?

