EMG x Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 - Black Cylinders and Cylinder Heads The fully adjustable hop-up and

The fully adjustable hop-up and bucking are standard TM pattern

This is a solid

making it suitable for left or right-handed users without modification

The Hopup Chamber EVO unit is designed to accept the 18

Green gas magazine that fits in the airsoft KWA M11 gas gun

EMG x Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 - Black Cylinders and Cylinder Heads The fully adjustable hop-up andPrecision machined from a block of billet EN AW 7075 T651 aluminum Quick change spring guide system Durable anodized finish Reinforcement in key stress points to counter rapid wear from high performance parts Pre radiused cylinder windows helps evenly distribute impact force Deeper wire channels along base of gearbox EMG Logo engraved on side of gearbox Manufacturer: EMG x Retro Arms CZ Specifications: Compatibility: For Tokyo Marui, G&P, Matrix and