ShineUs 5.56mm Headspace Gauge Set.
Brand: ShineUs

5.56 NATO MIN and 5.56 NATO MAX Chamber headspace gauge set and Precision Machined from hardened tool steel to last a lifetime of use.Must have Tool to check and set the chamber headspace. Size specs: 5.56 Min is 1.4636" and 5.56 Max is 1.4736"

Must have Tool to check and set the chamber headspace.
Ground to a tolerance of ± 000015 in
For 5.56 NATO chambers