The MSD or Mil-Spec Dragon features a 5.56 NATO chamber barrel, made from Mil B-11595E chrome lined M4 profile barrel. The upper/lower receiver is made from forged aircraft grade 7075-T6 aluminum and features a hard coat anodized finish. An F Marked fixed front sight tower, A2 pistol grip, polymer hand guard and polymer stock are all standard features. This rifle uses a direct gas impingement carbine length gas system. - CALIBER .223 REM/5.56MM NATO - MAGAZINE (1) 30rd capacity - BARREL 16" MIL B-11595E Chrome Lined M4 Profile, 1:7" Twist, A2 Flash Hider - RECEIVERS Forged 7075-T6 Aluminum - HANDGUARD Polymer - TRIGGER Mil-Spec - STOCK DS4 6 Position Adjustable