♦ FOR SYSTEMA from Zparts, VIPER, VFC, MARUI ♦ Include: 10.5'' SMR,Accessory rail-Long, Accessory rail-Short, #10-32 UNF X 3/8'' Screw, Allen key 1/8'' ♦ Aluminum alloy CNC machining ♦ Coated with hard anodizing in MIL-STD ♦ Exactly copy genuine parts ♦ All the chamfering signatures and sizes, all the tool marks, and bore hole signatures are fully restored