Hey everyone, New to the board here but after a couple of hours of futzing about with this i decided to try asking some people who might know. my problem is the "screw"? that locks the stripper clip guide into the reciever. I bought the gun used and it didn't come with any of the fancy little bits springfield includes when you get it new, like for instance oh,.. the owners manual or any tools... any who. Been trying every allen wrench under the sun and come to one conclusion, either its not an allen drive, or there is some other type of allen between standard and metric. well my question for you guys is does anyone know what tool i need or where i could get one? thanks guys!