Have been looking for a silencer for mine as well. Actually just found a battle adapter for an older rifle that fits great, so I now have a threaded portion. Now just to find a silencer or build one.
I got a gunsmith to do it as I was concerned about it been ok, it's so quiet now and still shoots brilliantly , the air stripper has been replaced by the aluminium piece and the silencer screws on, it wasn't cheap but well worth the cash
I have been out in the middle of the night shooting at a pile of carpet (as a back stop) in the garden and its so quite. With out the silencer i would have everyone out of bed
BBF
Did I mention that I'm the only one to have attended EVERY meet since we started