Please refer to your airsoft gunsmith for proper installation/fitting

Aluminum Upper Receiver with Metal Barrel Assembly

The MCR features updated externals such as free-floating Keymod rail system and long barrel

these have an upgraded 8mm Version 2 Gearbox featuring the electronic trigger and quick-change-spring system

8 spacers for fine tuning

Lancer Tactical Gen 2 Hi-Cap AEG Airsoft Training Metal Magazine Airsoft HK MP7 Please refer to your airsoftOne round of winding allows you to shoot all 300 BBs (eliminates re winding)! Holds a high capacity 300 rounds of 0. 20g BBs Compatible with all Lancer Tactical M4 AEGs and most M4 AEG Rifles Constructed with a metal frame for durability High tension spring feeds BB into AEG with ease