Call CVA, they will probably send you a new BP free. If not they are only about $15 and can be bought from CVA or at Cabellas, Bass Pro, Sportsmans Warehouse, Dixie Gunworks, etc.
I can't imagine how one would strip the threads on one of these, you would really have to work at messing those threads up. Mine goes in all the way with just fingers with no sign of cross threading or binding as long as it has thread lube on it which keeps it from seizing after shooting. Make sure to inspect the internal threads of the barrel to ensure they are sound, you don't want any surprizes once you get the thing back together and start shooting.
Good luck and be safe.