The As-Val is a similar concept to the VSS Vintorez no? I do recall seeing a couple of them and they were quite similar looking, and fired the same 9x39 caliber round except I recall the VSS having a much different stock and was configured as more of a "sniper" or marksman rifle. Though I don't see the REAL benefit due to the subsonic round unless it is for closer range engagements.
Cool! Where did you get to play with one? And was there any noticeable balance/handling issue with the offset mag?