Due to being lazy I have not looked at any links posted , but I had a friend do the welding and he welded about 3/4 of a ring onto one of my mosins , did this because I scoped it and with the scope over hang you could not operate the safety very well at all , he did not think it would hold or even weld up right , but its been on there for a few yrs now , not as fast as a sporting rifle but plenty functional