American Tactical Alpha Maxx RIA SpecificationsManufacturer: American Tactical Imports (ATI)Model: Alpha Maxx RIACaliber: 5.56 NATO / .223 RemingtonBarrel Length: 16 inchesTwist Rate: 1 in 7 inchesAction: Semi-AutoHandguard: 15-inch Free-Float M-LOKStock: 6-Position M4-Style Adjustable StockReceiver: Hybrid Polymer Lower with Reinforced Metal InsertsCapacity: 30 roundsMagazine Included: 1x 30-Round MagazineMuzzle Device: A2 Flash HiderGas System: Carbine-LengthFinish: Matte BlackCompatibility: AR-15 PlatformUse Case: Tactical Training, Recreational Shooting, Home Defense