V Seven Weapon Systems 300 AAC BLACKOUT BARREL - 5.5"

300 AAC BLACKOUT CALIBER STAINLESS STEEL 416R ROCKWELL C 30-32 7 TWIST POLY RIFLING MEDIUM CONTOUR V SEVEN ULTRA MATCH LAPPED 5/8 X 24 THREADS PORTED FOR SUPERSONIC AMMO BARREL EXTENSION FEATURES TRUE 30 CAL IMPROVED, EXTENDED FEED RAMPS & MELONITE BLACK FINISH WEIGHS 15 OZ W/ GAS BLOCK SHIPS WITH 17-4 STAINLESS PIN-ON GAS BLOCK (Proprietary gas block height manufactured to match the straight V SEVEN gas tube) & PROPRIETARY INCONEL STRAIGHT GAS TUBE IN DLC BLACK FINISH **PORTED FOR SUPERSONIC AMMO ONLY. **EXT-gas tubes do not fit with Aero Precision Enhanced Upper Receivers (M4E1 & M5E1), Mega Arms billet uppers, or Seekins Precision SAR Handguards. **Carbon fiber or round handguards that do not have the gas block notch may not clear the tall proprietary V Seven gas block on this barrel.