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/BRACE: MOE CARBINE STOCK - MAG: 10RD - MUZZLE DEVICE: A2 FLASH HIDER (1/2 X 28) - TRIGGER: STANDARD - WEIGHT : 6.56 - LENGTH (STOCK COLLAPSED): 32 1/2 - LENGTH (STOCK EXPANDED): 35 3/4