Mechanical components are the small parts inside the AEG gearbox that control when and how the gun fires: cut-off lever, anti-reversal latch, selector plate, safety cover, gear sector clips, shims and the small springs that hold it all in place. These are typically parts that wear or break after many thousands of shots, or that need replacing when you upgrade the motor, spring or gears. A faulty cut-off lever or anti-reversal latch can stop an otherwise working gun – and on the other hand it costs very little to replace.
Mechanical components are the small parts inside the AEG gearbox that control when and how the gun fires: cut-off lever, anti-reversal latch, selector plate, safety cover, gear sector clips, shims and the small springs that hold it all in place. These are typically parts that wear or break after many thousands of shots, or that need replacing when you upgrade the motor, spring or gears. A faulty cut-off lever or anti-reversal latch can stop an otherwise working gun – and on the other hand it costs very little to replace.
Most of the range comes from SHS, with budget-friendly standard parts such as spring sets for V3 and V7 (M14), cut-off levers and selector plates. Ultimate and Retro Arms cover the upgraded alternatives, including CNC-machined cut-off levers and anti-reversal latches as well as gear sector clips in packs of 6. You will also find individual parts from ICS, Guarder, Krytac, Prometheus, Element and CORE, shims from Hank Tactical and ZC Airsoft and a few PTW parts from Systema. Prometheus' cut-off lever sits at the top of the range.
What to look for
Gearbox version: Most parts only fit one gearbox version. V2 is found in e.g. M4 and MP5 replicas, V3 in AK and G36, and V7 in M14. Always check which version your gun has before you order.
Selector plate for the right model: Selector plates are model-specific, even within the same gearbox version. We have them for M4 (V2), G36, AK, MP5 and PSG-1 as well as for ICS EBB gearboxes.
Standard or upgraded: A standard cut-off lever from SHS is the inexpensive choice, while the CNC-machined versions from Retro Arms and Prometheus are typically chosen for upgraded builds where the parts are stressed harder by a more powerful motor or higher voltage.
Shims: Shims adjust the position of the gears in the gearbox so they mesh correctly and make less noise and wear. They come as loose 0.2 mm shims, as mixed sets with 0.10, 0.15 and 0.20 mm, and as sets for gears with a 4 mm axle.
Who it suits
For those who work on their own AEG and want the small wear parts on hand before something breaks – or who are in the middle of an upgrade. If you are not sure which part you need, our workshop in Aulum, Denmark can help, and you will find the rest of the gearbox internals under gears, bushings and bearings.
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