I got a TM scope rail for my VSR-10 and attached it.
do you mean the scope rings will not mount onto the rail?
I think that's the problem... looks like it was built for mounting on something else. Dang thing. No rings, it's all built into it.
ya, u gotta watch that, "airgun" scopes will not fit airsoft rifles, they are like 2mm too small or something, not a visibly noticable size difference, but its there.
you could always tape it...
You also need to make sure who made it... Your TM rail might be a replica of a US Rail so it is made to US measurements... I had a similar problem when I was trying to put a russian SKS Scope on a M4 Rail... Russian Scope was smaller then the rail so no go...