AOA has Hugget universal (which they install) and Neil Clague makes them. Little harder in the US to find them because some find it a grey area on self install legality. Ya........... it is always a debate on the forums. I would throw one on my S510 if it was as easy as in the UK.
Thx for the info ! The barrel on S510 looks bit tinny in comparison to other guns like BSA MK2 or S510 ultimate sporter (new version that is) The moderate will be a nice addition to the look of the gun.
This is the setup I run on my Air Arms rifles. Very easy to do. Super quiet. You install it all yourself and it's easily removable. No need to send in your gun anywhere.