I just found this thread and thought I would share a couple of pictures of an AR pistol that I put together earlier this year. I put an UZI along side of it so that you could compare the size of the build. I used a RR Pistol lower with a 1.5# pull single stage match trigger and a 7.25" long barreled DPMS upper for this .223 caliber thumper. I used a reduced length recoil tube from Gunsmoke ENT to help make the overall length 3" shorter. You need Sunglasses to shoot it at dusk.
(Roughly 6 - 8 feet of muzzle flash.):rocking:

Later,
Bert

Very nice!