Is a winner!
10.5" lightweight barrel from J&T Distributing, pistol buffer tube, carbine buffer and spring
10" Samson Evo from Samson Manufacturing
Low profile extended .625 gas block from Samson.
Quick Flip front and rear sights from Samson
I put about 200 rounds through it yesterday with no functioning issues. Shot it from 25 to 300 yards. Off hand steel from 40 to 100 resulted in monotonous hits.