hello. im kinda new to inlines, just traded for a thompson/center 209x50 contender barrel. and forend.
it dont fit on my older contender frame ? the barrel is used,
''they'' say ? i can grind down the nub, and make it work.. anyone do this ?

''they'' also say, it will void the warrenty, but ..heck, its a used barrel.
i just want to use my frame, love the trigger.

any thoughts on this ?