EMG x Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 - Black 0.20g Biodegradable The trigger spring extension is

The trigger spring extension is carefully insulated to prevent short circuit to controller board

Umarex 2278059

Also works with Classic Army M24 LTR rifles

plus an internal compartment for what ever else you carry

you gain a whole bunch of features previously unavailable in the world of HPA replicas

EMG x Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 - Black 0.20g Biodegradable The trigger spring extension isPrecision 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