Clymer No-Go Gauge 5.56mm NATO

The Clymer 5.56mm NATO No-Go Gauge is a high-quality tool designed to ensure the safety and functionality of your AR-15 rifle chambered in .223 Remington, .223 Wylde, or 5.56 NATO. By using the Clymer 5.56mm NATO No-Go Gauge, shooters can have peace of mind knowing that their rifle's chamber is within the proper headspace dimensions, ensuring safe and reliable shooting. Manufactured with precision and built to SAAMI's standards, this gauge is an essential tool for anyone involved in rifle assembly, gunsmithing, or chamber reaming.

Features:

• Manufactured from precision ground hardened US steel to SAAMI's ANSI tolerances
• Measures the distance between the breech face and the base of the cartridge on a closed action
• Best results achieved by removing the extractor, ejector, and firing pin from the bolt during headspace check
• Use of both GO and NO-GO headspace gauges is recommended for newly reamed chambers
• Ensures a safe and accurate chamber that accepts SAAMI maximum ammo
• Precision machined for reliable and consistent performance
• Checks the maximum chamber length for safe function (No-Go gauge)
• Compatible with AR-15 rifles chambered in .223 Remington, .223 Wylde, or 5.56 NATO