Armyforce Silencer Adapter For Marui MP5K/ PDW (14mm+ to 14mm-) [AF-AD-AD020-AG] - US$7.00 : Airsoft Global!, Gun
Nine Ball NEO SAS Silencer Adapter for Tokyo Marui MP5 Style AEG Airsoft SMG, Accessories & Parts, External Parts, Threaded Adapters - Evike.com Airsoft Superstore
HK 3 Lug to 14mm- Barrel Adapter for MP5, MP5K, G3 (XKSGU2AN7) by cynosurex
King Arms 200mm Silencer 14mm Clockwise/Anti-clockwise thread adapter