CALIBER: 5.56 NATO – BARREL: DIAMONDBACK BARRELS 5.56 CARBINE-LENGTH16 MEDIUM 4150 CrMov BLACK NITRIDE – TWIST: 1:8 RH – GAS SYSTEM: CARBINE-LENGTH GAS SYSTEM – BCG: SHOT-PEENED MAGNETIC PARTICLE INSPECTED MIL SPEC 8620 CARRIER – UPPER: A3 FLATTOP FORGED 7075 T-6 ALUMINUM T-MARKED – LOWER: DIAMONDBACK STANDARD FORGED 7075 T-6 ALUMINUM LOWER – HANDGUARD: 12 M-LOK RAIL – GRIP: MOE GRIP – STOCK: MOE CARBINE STOCK – MAG: GEN 2 PMAG 30RD – SIGHTS: NO SIGHTS – MUZZLE DEVICE: A2 FLASH HIDER (1/2 X 28) – TRIGGER: STANDARD TRIGGER – WEIGHT: 6.3 LBS – LENGTH: (STOCK COLLAPSED 32 1/2) (STOCK EXPANDED 35 3/4) – 16 300B/O UPPER (ASSEMBLED) – UPPER: A3 FLATTOP FORGED 7075 T-6 ALUMINUM T-MARKED – HANDGUARD: 12 M-LOK RAIL – GAS SYSTEM: CARBINE-LENGTH GAS SYSTEM – MUZZLE DEVICE: A2 FLASH HIDER (1/2 X 28) – Diamondback Barrels 16 4140 Chrome-Moly Free Float Black Nitride