These headspace gauge will allow you to determine the headspace on your .22 LR firearm.
Select Size:
| .039 | .046 |
| .040 | .047 |
| .041 | .048 |
| .042 | .049 |
| .043 | .050 |
| .044 | .051 |
| .045 | .052 |
Each gauge is marked with its size. Use these to check existing firearms, when installing pre-fit barrels, or along with Shim Kits to fine-tune headspace to match your ammunition.
Headspace gauges are made from stainless steel.

