If you have a Lathe you can cut a channel into the hammer and insert an O-ring into the channel.
If not then some people have glued rubber washers to their breech’s/hammer.
I have a lathe and I havent bothered doing this so I cant really give you any more specifics… BUT, I do have a spare Breech laying around so I might give it a try at some point.
Check the talontunes website – I think he has a picture on there somewhere which is probably better than my advice.
thanks alot yellow ninja I’ll try the rubber washer on the end.