Headspace FIELD Gauge 5.56mm NATO Caliber for AR15

Available on backorder

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SKU 556-field Category

This high quality machined steel gauge determines overly excessive headspace in the barrel’s firing chamber. This can indicate firing chamber or bolt wear. If a rifle’s bolt closes on a FIELD gauge, that means that the chamber is oversized and the rifle should not be fired. The barrel should be replaced. The Gauge is etched with caliber marking, and “FIELD” designation. Machined to SAAMI specifications, and made in the USA.


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