silencer adapter and a weirauch
Used one of these myself a while back,make's the gun super quiet but also make's the gun really long.
It will also change you point of impact with the change in weight.
You will find that each time you put the muzzle back on you will have to alter the scope setting's.
Dean burfoot had a muzzle made that was the same as the standard except the front removed to add a silencer,also a weirauch and all you could hear was the trigger click.