Palmetto State Armory AR-15. 5.56 mm, 1/7 twist barrel. Lower is multi-caliber. Reduced weight trigger spring installed. I have the flip-up open sight that came with it along with the scope that's on it as well as a lighted reticle scope and mount for this rifle. Approximately 950 rounds of ammo, 9 30-round magazines, one 5-round magazine. Package deal, $1300 or make me an offer. Text or call 580-301-3133. In person pickup only, no checks accepted.