Enhanced High Speed Half Teeth Piston, Bolt Back M4 Series
Item No.: 1152
US$10
Air-tight Nozzle, Recoil Shock M4
Item No.: 1085
Bolt Locks, Recoil Shock System M4
Item No.: 1072
US$33
Steel cut-off lever, Recoil Shock System M4
Item No.: 1071
US$16