CSC ARMS WARHAWK AR PISTOL. CSC Forge Aluminum receivers. CSC Billet Aluminum 10"  or 7" KeyMod Handguard weight 10 ounces. CSC 10.5" or 8" 300 blackout 1/8 twist barrel Black nitrided coated, pistol length gas system, 5R Button rifled. OR CSC 10.5" 5.56/.223 1/7 twist Black nitrided coated, Carbine length gas system, 5R Button rifled. CSC 3 Port Muzzle brake. CSC Nickel Boron Bolt Carrier Group, CSC Nickel Boron Charging Handle, CSC Nickel Boron Mil-Spec Trigger Group.