Have 1962 M-S .243 cal. full stock carbine I need to remove the stock. I've removed the front sling ring bolt, the main bolt in the belly of the stock just in front of the magazine, the screw at the aft end of the trigger guard and the one on top behind the safety. There is one just behind the set trigger but I cannot remove the trigger guard assembly to get to it. Any idea how to remove the trigger guard without a hacksaw?