Lonex gearbox 8mm for ak-beta (sp100)

New hi quality model available
8mm reinforced box with ball bearing bushing

Custom parts installed:

-hi pressure cylinder set with steel cylinder
-dual steel speed up gear set
-sp100 spring with ball bearing guide
-low resistance silver wires with anti heat switch
-steel trigger and trigger spring
-reinforced steel/pom piston
-steel trigger

ideal use for ak47 with short barrel