Bought a repro m41b to use for CMP sniper matches. Wanted an original but just dont have the cash to put down right now. rifle shoots extremely well. cant quite figure out how to remove the scope from the mount. i have several long side rail 98k snipers and its just a simple matter of just pulling the lever back and sliding the mount off. this one wont budge at all, neither the base or the lever. just wondering if i'm just missing something?