The KWA Barrel Extension is a CCW threaded outer barrel extension that adds 1/2 inch to any outer barrel. Most commonly, it is used to convert a KWA CQR Mod 1 or LM4 barrel base to the full 10.5 inch length, allowing for proper mounting of flash hiders in front of the bayonet lug.
Part 299-2 will fit any -14mm airsoft gun, both AEG or GBB. It can be used to make sure flash hiders fit flush with free float rail systems, or that QD flash hiders fit against the rail system or handguard correctly.
KWA Half Inch M4 Outer Barrel Extension Features: