Systema Revolution gearbox - Model 5 for M16 type of weapons (M160 spring). Systema revolutionary solution for powerful upgrades! Gearbox itself is reinforced in the critical locations where the conventional types can crack. It does not need to use feeder hangers and can therefore be used more durable material. Gearbox interior contains similar electronics as we know at Arms Systema PTW v. 4 is used (!)gears, piston with metal teeth, ball bearings, low resistance wiring, special NBU cylinder set etc. The delivery also includes ultra torque motor.
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