Glock or Colt 9mm AR lower?

[OneGuy67]

I understand the reasons for making a dedicated 9mm using the Colt design pistol upper. But have your considered a Oly design which Colt multiple times has tried to acquire so they could make those instead of their own? No dedicated lower needed. The new Oly mags are plastic but STEN mags are still plentiful and cheap if you use a block.

I am running Oly design and a couple of my friends have went the Colt design and sold them to get the Oly design.

The only real drawback to the Oly design is you dont get to fuss with it to get it to run reliably. They run great out of the box.

I'm old school and Oly didn't have the best reputation for the longest time. They may have improved vastly since then, but the prejudice still exists.

Nfa the maker of that 80% lower has their upper which has a working bho. You can build using any colt upper and modify the bolt or buy just the bolt. The bho will not work without factory upper though

Glock mags are metal lined but magpul has proven that to be a non issue

I was leaning in that direction; however, they can't keep their uppers in stock. I don't know when they will get more.

Piece the upper together. BBl is 10.5" GM, CMMG BCG (i profiled it for the glock mag) upper, float tune, grip LPK ALL from the parts bin.
Ti can is F1 with SDTA brake. total $$ Less can & stamp $500. I might cut the bbl back another 4" I put a RDS after pics taken









Something like that link can be built for under $1K PROVIDING you go with a sig brace. OR Form 1 , then add stock

Yup! I am cheap and I build things item by item as I can afford them. I think this build will be my first foray into the SBR world. I have to read your post you did earlier about the changes coming down to determine which way to go.