Iron Horse AR-15 Complete Upper 6mm ARC Kit Black/Grey IH-CU2. 5in 7075 hand-guard 7075 billet upper proprietary barrel nut and sleeve for maximum accuracy. Chambered in 6mm ARC Proof Research Carbon Fiber Barrel 18in w/ rifle +1in gas system and...
Iron Horse AR-15 Complete Upper 6mm ARC Kit Black/Grey IH-CU2. 5in 7075 hand-guard 7075 billet upper proprietary barrel nut and sleeve for maximum accuracy. Chambered in 6mm ARC Proof Research Carbon Fiber Barrel 18in w/ rifle +1in gas system and...