[4V50 Gary]

The whole matter of assembling an M1 is not a simple one. Headspace can be a matter of setting the barrel back (in which case the timing better be proper), replacing the bolt, or checking to see whether the corresponding locking points on the receiver aren't too worn. For a novice without the proper tools to assemble and gauges with which to ensure proper assembly, it's a daunting task best left to the gunsmith.

Unlike the AR-15 (and its clones), the M1 Garand does not lend itself to home gunsmithing (other than trigger jobs and glass bedding).