M1 Garand Timing Block
Click here to download the drawing. Print a copy for reference.
Visits since 28 January 2011
The block is used to test the bolt release.
With bolt locked back on an empty chamber, insert the timing block.
Push the block down slowly. The bolt must not release until the bottom of the slot
is level with the receiver.
The bolt must release before the top edge of the slot contacts the receiver.
Also see this page from Badger Ordnance