Brownells 5.56x45mm Field Headspace Gauge
Lowest Price
$43.46
MSRP
$46.45
Savings
6% off
In Stock at
3 Stores
Updated
Jul 4, 2026
Compare Deals from 5 Retailers
Lowest price first
Specifications
Description
The Colt Field 5.56x45mm headspace gauge is manufactured according to the Colt factory's precise specifications for M16/AR-15 rifles. It measures the maximum factory-acceptable headspace, providing a crucial assessment for firearms that have undergone extensive use or have been rebarreled.