The GO2 Weapons G215 Rifle 5.56 is a Modern sporting rifle chambered in 5.56 NATO. The G215 features a mil-spec forged upper and lower which are full auto rated including the Bolt Carrier Group (BCG), featuring a free floating Slimline M-lock handguard design, a custom ambi-safety, mil-spec rated B5 Bravo 6 position stock and is finished in an anodized black hardcoat. This specific model also features a 16″ barrel threaded in 1 1/2 x 28.This barrel is built with 4150cmv steel. The GO2 Weapons G215 Rifle 5.56 includes a NIB M4 feed ramp extension with a carbine length gas system. Weighing at only 6.5 ib this is the perfect weapon for the avid to advanced shooter.