1/2-28 to 1/2-28 Barrel EXTENSION, Threaded Adapter 2-1/4" Extra Long - SKU#036 - Hughes Precision LLC EXTRA LONG barrel extension
Nine Ball NEO SAS Silencer Adapter for Tokyo Marui MP5 Style AEG Airsoft SMG, Accessories & Parts, External Parts, Threaded Adapters - Evike.com Airsoft Superstore