hi sir
sorry you dont put your name down it makes it easyer to address you my name is andy now one thing you mentioned suhl brls best thing to do is bring it to a gun smith to gauge the brls 460 doesnt make sence to me did you take the brls off the frameand inspect it carefully the gun has age thats for sure but those markings under powerfull magnification should reveil the calliber let us know last is the brls steel correct let us know god bless andy militarynut