Noveske Infidel, Gen 4, Semi-automatic Rifle, 223 Rem/556NATO, 13.7 Barrel (16 OAL with Pinned Brake), KX3 Muzzle Device, Black, Magpul MOE SL Stock, 30Rd, NSR-15 (M-Lok) Handguard 02000711 This rifle features a Gen 4 precision machined billet upper receiver with extended feed ramp and anti-rotation interface with the handguard. Additonal features include a 13.7" Infidel barrel with a pinned and welded KX3 muzzle device to bring it to a legal 16" length, ambidextrous selector and bolt catch, ambidextrous charging handle, 15" NSR M-LOK rail, Magpul MBUS Pro sights and a Magpul SL buttstock assembly.