12.5" AR-10 .308 1x10 BALLISTIC ADVANTAGE TACTICAL GOVERNMENT CARBINE GAS BARREL - MODERN SERIESMPN: BABL308008MThis .308 chambered (DPMS style) 12.5" Tactical Government Profile Modern Series Barrel is machined from 4150 Chrome Moly Vanadium steel with a QPQ Corrosion Resistant Finish and QPQ coated M4 feed ramp extension. DPMS GEN 1 Platform Material: 4150 Chrome Moly Vanadium Profile: Tactical Government Finish: QPQ Corrosion Resistant Gas System Length: Carbine Length Gas Block Journal: .750" Twist Rate: 1:10 inches Muzzle: 5/8x24 Threaded Weight: 1 lb 14 ozGuaranteed to Perform We stand behind our commitment to performance. All Ballistic Advantage barrels are guaranteed to give sub Minute of Angle (MOA) accuracy with match grade ammunition. We define sub MOA as a group size of 1 inch or under at 100 yards with a 3 shot magazine fed group, or 5 shot single loaded group. ALL NFA RULES APPLY. CHECK YOUR LOCAL LAWS AND WITH THE ATF BEFORE ORDERING THIS BARREL.