Fix a common weak point
The body pins that hold your gearbox in an M4 or M16 receiver are one of the most overlooked failure points in a build. Stock replicas often use soft alloy pins that bend, mushroom or loosen, especially once you fit a stronger spring or run a high rate of fire. This Guarder set replaces them with reinforced steel.
Why steel matters
When a body pin flexes or wears, the gearbox can shift fractionally inside the receiver. That misalignment feeds straight into your gears, cylinder and hop unit, causing inconsistent feeding, odd noises and premature wear. Hardened steel pins hold the gearbox firmly in place so the whole drivetrain stays true under load.
Direct drop-in fit
Made for M16 and M4 AEGs on a Version 2 gearbox, these are a straight swap for the original pins. No filing, no modification, just push out the old and fit the new. It is one of the cheapest bits of insurance you can add to an upgraded gun.
Fit it yourself or let us do it
Confident players can fit these at home in minutes. If you would prefer it handled during a service or a power change, our in-house team can take care of it. Explore more parts in our airsoft accessories range or book our airsoft repair service.
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