The Brownells 5.56mm NATO Field Headspace Gauge (1.4736") is a single maximum-dimension field gauge designed to verify safe headspace in AR-platform rifles chambered in 5.56mm NATO. It provides a precise go/no-go reference point to ensure your chamber dimensions fall within safe operating specifications.
Specifications
ManufacturerBrownells
Product TypeHeadspace Gauge
Caliber5.56 MM NATO
Weight0.15 lb
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