T238 AEG Piston Rack Pro Edition Triggers The RetroArms CNC Gearbox M4/416

The RetroArms CNC Gearbox M4/416 TM NGRS (8mm) is a premium CNC-machined gearbox shell designed specifically for Tokyo Marui Next Gen Recoil Shock (NGRS) M4 and HK416 platforms

Ambidextrous design for left- and right-handed users

Do not overfill to avoid spring wear

making it exceptionally durable yet lightweight — ideal for high-speed and high-torque AEG builds

The BASIC version is ideal for standard builds

T238 AEG Piston Rack Pro Edition Triggers The RetroArms CNC Gearbox M4/416Boost the reliability and precision of your gearbox with the T238 AEG Piston Rack Pro Edition. Engineered for high performance builds, this rack features enhanced durability and perfect tooth alignment for consistent engagement. Ideal for users upgrading their piston assembly for improved longevity and smoother cycling, especially in high speed or high torque setups. Features: Reinforced metal rack for high torque and high speed builds Precision