Forster 5.56 NATO Maximum Chamber Headspace Gage

Forster‘s 5.56 NATO Maximum Chamber Headspace Gage (brand part no. HG556NATOMAX) measures a rifle chamber to confirm it’s within the safest expected tolerance rather than left to guesswork. Designed to S.A.A.M.I. specifications, the gauge is held to 1.4736 inches plus zero, minus 0.0003 inch, giving an AR-15 armorer or builder a precise maximum chamber reference. It’s a practical checkpoint before firing a newly built or rebarreled 5.56 NATO upper.

Key Specifications

• It checks against the maximum chamber specification for 5.56 NATO.
• It’s held to 1.4736 inches plus zero, minus 0.0003 inch per S.A.A.M.I. spec.
• It’s a practical check for AR-15 builders and armorers.

Frequently Asked Questions

What does a maximum chamber gauge check? It confirms a chamber hasn’t been cut past the safe maximum tolerance, following S.A.A.M.I. specification.

What platform is this gauge built for? AR-15 rifles and uppers chambered in 5.56 NATO.

Buy the Forster 5.56 NATO Maximum Chamber Headspace Gage

A S.A.A.M.I.-precise maximum gauge is a smart final check before firing a new 5.56 NATO build. Browse our gunsmithing tools selection and order from our Lubbock, Texas gun shop for fast shipping.