The Brownells Colt Field Headspace Gauge is made to Colt factory special dimensions for use on M16 and AR-15 rifles. It measures the maximum factory acceptable headspace to help verify chamber condition on rifles that have seen extensive service or have had a rebarrel.
Key Features
Colt-spec field gauge for maximum headspace verification on M16/AR-15 platforms
Confirms whether a chamber is within Colt maximum factory headspace tolerance
Hardened and ground steel construction for durable, accurate gauge checking
Headspace measurement: 1.4736
Tool dimensions: 1.65 in overall length, 0.3655 in diameter
Use this maximum Colt field gauge as part of a chamber inspection routine to support confident service and rebarrel evaluations.
