Hummingbird Short-Stroke Bolt Assembly | GHK AR / M4 GBB Series | Maple Leaf

Maple Leaf Hummingbird Short-Stroke Bolt Assembly – for your replica

This bolt assembly replaces the standard bolt carrier in your GHK AR/M4 GBBR. The part shortens the bolt travel, allowing your replica to cycle faster during full-auto fire. You use this GBBR bolt upgrade when you want to achieve a higher rate of fire or when you want to modify your replica for use without a stock or with a folding stock. The Hummingbird retains the bolt lock function you are used to from gas blowback replicas.

Technical specifications

The bolt assembly is manufactured from aluminium with a silver-coloured finish. The design features a shortened bolt system with integrated return spring guide. The construction is drop-in compatible with GHK receivers without requiring any modifications to your replica. The weight and dimensions are matched to the original GHK bolt group to maintain the blowback characteristics.

Compatibility and application

This bolt assembly is specifically designed for GHK AR/M4 GBB series replicas, both older and newer versions. The part fits standard and custom builds where a higher cyclic rate is desired – up to approximately 18 rounds per second depending on gas pressure and inner barrel configuration. Installation requires basic knowledge of GBBR internals but no special tools. The bolt works with all GHK compatible magazines and gas types.

Ready to add the Maple Leaf Hummingbird Short-Stroke Bolt Assembly to your setup?