Forster Headspace Gage 300 Blackout FIELD length Rimless
$31.95
$32.99
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$1.04
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The Forster Headspace Gage 300 Blackout FIELD length Rimless is a precision measuring tool built for reloaders and gunsmiths who need to verify that a rifle chamber is operating within safe limits. This is the field gauge variant—the most critical tool for determining absolute maximum safe headspace. If your bolt closes on a field gauge, the chamber has exceeded safe limits and the firearm should not be shot. It's an essential checkpoint when evaluating used rifles, testing newly chambered barrels, or performing routine headspace verification on your precision rifle.
Forster manufactures these gauges to exacting SAAMI specifications, ensuring that your measurements are accurate and reliable. The 300 Blackout field gauge is machined from hardened steel for durability through repeated use—your measurements stay consistent over years of reloading and gunsmithing work. Because headspace directly affects case life, accuracy, and safety, having the right tool for the job isn't optional; it's foundational to responsible rifle maintenance and handloading.
The field gauge fits into a complete headspace verification system: pair it with a go gauge (minimum chamber size) and no-go gauge (maximum standard headspace) to perform a comprehensive assessment of any 300 Blackout chamber. Whether you're building a subsonic hunting rifle, evaluating a used upper receiver, or maintaining match-grade equipment, this gauge gives you the data to make confident, safe decisions about your firearm's condition.
