This is the SDI mid-length carbine upper w/govt. profile barrel.
The first trip to the range yesterday was impressive, to say the least. It was about 49 degrees, 100 ft. above sea-level (what ever Port Orchard, WA is) and I was using Winchester Q3131A with a 99 headstamp. At 100 yards, sighting in the irons with a spotter, I shot 3 groups under 3/4-inch, and 2 were actually less than 1/2-inch center-to-center. That just boggles my mind with Winchester ammo and iron sights. My spotter confirmed the groups because I was skeptical.
The rifle had no problems except one light primer strike, but I had another Q3131A round with the same issue from my LMT M4-gery or Colt HBAR (I don't remember which.) It spit the brass out about 5+ feet at 3:00 o'clock.
The dime in the target is for reference. What could I do with Black Hills ammo and a scope?
ETA: I'd like to thank Talon Arms for a fine upper! The fit/finish were excellent, and apparently it's a shooter as well!