i finaly got around to choping the barrel only 1 inch to remove factory machining and i fitted with a self fabricated muzzle break. i have made a plastic prototype of the underlever retainer and need to machine the end of the underlever to reinstall the plastic clip that goes on it. here is the problem i need to be able to get the underlever in the lathe but i can not figure out the pin at the cocking lever not where it attaches to the tube is it press fit or is it some kind of rivet any suggestions.