When I need work on a firearm, and I have no "experts" for my type of gun, I always go to Martin Retting In Culver City. They are expert in Mil. Surp. arms, and damned good with all guns. Hell I got my first rifle, an Enfild .303 there back in '61 from them. The same owners and the same gunsmith (Keith) are still there, a 3rd generation shop, they were, and still are the Kings Of Military arms. Also Armory of Orange, in the City of Orange is a well respected outfit.. Good luck...Ray