FORSTER 5.56 ARMORER'S HEADSPACE GAUGE KIT

The Forster 5.56 Armorer's Headspace Gauge Kit is a professional-grade headspace inspection system designed to help armorers, gunsmiths, and AR builders quickly verify chamber dimensions in 5.56 NATO rifles. Exclusively available through Brownells, this three-gauge kit provides a practical method for evaluating headspace at critical measurement points, making it ideal for new rifle builds, barrel installations, maintenance inspections, and troubleshooting.

Unlike traditional headspace gauges that often require bolt disassembly, these gauges feature a reduced rim and ejector cut-out design that allows headspace checks to be performed without removing the ejector from the bolt. This streamlined approach helps save valuable shop time while maintaining the accuracy needed for professional armorer work.

Manufactured by Forster, each gauge is precision-machined from steel to provide reliable, repeatable measurements. The inclusion of GO, Midrange, and Maximum Field gauges gives armorers a more complete picture of chamber condition, helping verify proper barrel installation and monitor firearm wear over time.

FEATURES

• Complete 5.56 NATO headspace gauge kit
• Manufactured by Forster
• Designed specifically for AR-style rifles and 5.56 NATO chambers
• Includes GO, Midrange, and Maximum Field gauges
• Reduced-rim design allows use without bolt disassembly
• Ejector cut-out simplifies headspace inspections
• Precision-machined steel construction
• Ideal for rifle assembly, barrel installation, and maintenance
• Provides repeatable and accurate headspace measurements
• Professional-grade armorer and gunsmithing tool set

SPECS

• Brand: Forster
• Product Name: 5.56 Armorer's Headspace Gauge Kit
• Application: Headspace Inspection and Chamber Verification
• Cartridge Compatibility: 5.56 NATO
• Material: Steel
• Gauge Design: Reduced Rim with Ejector Cut-Out
• Gauge Dimensions
• GO Gauge: 1.4646"
• Midrange Gauge: 1.4686"
• Maximum Field Gauge: 1.4736"

INCLUDED

• 1.4646" GO Length Gauge
• 1.4686" Midrange Gauge
• 1.4736" Maximum Field Gauge

CUSTOMER INSIGHTS

Armorers and AR builders appreciate the ability to perform headspace checks without disassembling the bolt, significantly reducing inspection time during rifle assembly and maintenance. The addition of the Midrange Gauge provides a valuable reference point between standard GO and Field measurements, giving users greater insight into chamber dimensions and overall firearm condition.

The Forster 5.56 Armorer's Headspace Gauge Kit delivers a convenient and precise solution for evaluating 5.56 NATO chamber headspace. Featuring dedicated GO, Midrange, and Maximum Field gauges, along with a unique reduced-rim and ejector cut-out design, this kit provides the accuracy, efficiency, and durability demanded by professional armorers and serious AR builders.