The problem with some of the Soviet/Russian weapon designs is how to mount weapons accessories on them. In the case of the AS VAL/VSS Vintorez which have their integrated suppressors is to have a rail system on them. LCT Airsoft which makes airsoft versions of both weapons have announced their Silencer Rails made for these and for owners they have three lengths to choose from: PK413 (140mm), PK412 (75mm), and PK411 (45mm). For owners non-LCT airsoft versions, they will need to check compatibility.