The Echo1 USA Red Star CPM CQB Flash Hider is in stock at Airsoft Atlanta, and can be fitted on AK AEGs with the 14mm Negative Thread... "The Echo1 Red Star CPM CQB Flash Hider is the perfect custom AEG style muzzle brake for your airsoft gun. Fits on 14mm negative CCW threaded barrels. Fits directly on 21mm E&L AK rifles too, with its adapter. So it fits both 14mm (with included adapter), and native 21mm specifically for E&L AK rifles (all Gens). All metal construction, black only."