HELP....I was trying to fix buffer tube wobble on my G&G full metal combat raider. Went to tighten the buffer tube screw and it stripped out. Any ideas? There is still about 1/2" of depth in the screw hole that wasn't taken up by the screw and shouldn't be stripped. Maybe I can track down a slightly longer screw at the hardware store. Whats the real fix though? Tap out a larger hole? New gearbox?