A&K assembled mechabox set for M249 electric light machine gun

New spare gearbox assembled full set
replace model ready to install on A&K m249

included parts:
-metal gearbox case
-wire set with plug for m60
-hi torque gear set with metal bearing
-reinforced piston and piston head
-steel sp100 spring
-quick release spring guide
-hi torque motor short axle
compatible with A&K M249 minimi light machine gun.