16″ A2 Sight Tower M4 1×7 Carbine Upper No BCG or Charging Handle
1 × $265.95
16″ Zombie Green Upper 15″ Keymod Rail 5.56/.223
1 × $204.95
5/8-24 solid precision machined Stainless Steel Competition Muzzle Brake
1 × $39.99 Subtotal: $510.89