Take the strain off your gears
The ForceCore Armament FC-M4-036 uses a half-teeth layout, meaning only the rear portion of the rack is toothed. That reduces the load placed on the sector gear as it picks up the piston, cutting wear and helping your gearbox survive higher-stress builds.
Strength where it counts
Metal teeth stand up to the extra torque of upgraded springs and high-speed motors far better than soft polymer racks, so the piston keeps its shape and timing under sustained fire rather than stripping out.
Ready to install
It ships complete with a matched piston head, so you have a coordinated assembly ready to drop into a Version 2 gearbox rebuild. Compression and cycling stay smooth across semi and full auto, sharpening trigger response along the way.
Right for every skill level
Fitting is no harder than a standard piston swap, which makes this a sensible first internal upgrade as well as a dependable rebuild part for experienced techs. Explore more internal parts in our airsoft accessories range, or hand the build to our Kent airsoft repair and upgrade service.
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