Retro Arms CNC gearbox SOPMOD M4 TM (8mm)
Retro Arms CNC gearbox SOPMOD M4 TM (8mm)

Retro Arms CNC gearbox SOPMOD M4 TM (8mm)

£175.00
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RetroArms Gearboxes are manufactured from one block of aircraft aluminum (Dural) EN AW 7075 T651, they are milled on multi-axis CNC machines, THEY ARE NOT MILLED AFTERCASTINGS. For comparison, the strength of aircraft aluminum (Dural) EN AW 7075 T651 is 550MPa, common construction steel has only 390MPa.

All Retro Arms gearboxes are designed for the best durability, resilience and strength on the most powerful springs. These gearboxes are designed with Tokyo Marui compatibility and Retro Arms constantly innovate them.