So I have an aero M4E1 upper that shoots like garbage. I was window shooping on primary arms and saw a 22lr conversion kit. Didnt know they existed. So it goes without saying...I bought the kit. Heres my issue. I have a thordson stock, so my only other evil feature is my flashhider on the threaded barrel. Any suggestions on how to make this lord Cuomo approved as to not violate the rules of his majisty? Could I file the threads off and in weld a cap on it?