The Shark Coast Tactical Celtic 16a ^2 5.56 Complete Rifle features a custom integrated upper receiver and handguard platform that provides the shooter a light-weight rigid design resulting in superior performance and accuracy. The Celtic SCT Prototype Rifle includes an engraved upper and lower in Distressed Green Cerakote and a black Cerakote handguard. Features: 4150 CMV Melonite 1/7 Twist M4 Feed Ramps Carbine Gas System with Low Pro Gas Block A2 Flash Hider 1/2-28 Threaded Muzzle M16 BCG 15? MLOK Handguard Dry Film Lubed 7075 T6 Forged Upper w/ T-Markings Forward Assist & Ejection Port Assembly SCC-15 or SCT-15 Lower(in Serial Number Mil-Spec LPK Magpul SL-K Stock Magpul MOE Grip 30 Round Magazine