M4 RIS, Chinese made, 退鏜 , WA replica
Feel shooting real gun with Strong blow back
Magazine: 50 Rounds ( 6mm )
Muzzle Velocity: 380-410 FPS with 0.2g BB
Optional upgrade kit (Aluminum Buffer (Hard Recoil)) is available as separated item
Optional item(s) (can be purchased separately)
"Aluminum Buffer (Hard Recoil)"
"M4 氣動退鏜 氣筒全套