CALIBER: 5.56 NATO – BARREL: DIAMONDBACK BARRELS PISTOL-LENGTH 7 MEDIUM 4150 CrMov BLACK NITRIDE – TWIST: 1:8 RH – GAS SYSTEM: PISTOL-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: 6 M-LOK RAIL WITH BARREL NUT AND SCREWS – GRIP: A2 STYLE-BLACK PLASTIC – STOCK: BUFFER TUBE FOAM PAD – MAG: 30RD P-MAG – SIGHTS: NO SIGHTS – MUZZLE DEVICE: A2 FLASH HIDER (1/2 X 28) – TRIGGER: STANDARD TRIGGER – Additional upper – CALIBER: 300 BLACK OUT – BARREL: Diamondback Barrels 10 4140 Chrome-Moly Free Float Black Nitride – GAS SYSTEM: PISTOL-LENGTH GAS SYSTEM – UPPER: A3 FLATTOP FORGED 7075 T-6 ALUMINUM T-MARKED – HANDGUARD: 9 in. M-LOK Rail – MAG: 30RD P-MAG – MUZZLE DEVICE: A2 FLASH HIDER (1/2 X 28)