The Forster Products, Inc. 300 AAC Blackout NO-GO Gauge is essential for measuring the chamber length of a rifle, crucial for safety and precision when chambering a new barrel or buying a used gun.
Constructed to SAAMI specs, this gauge is .0005 inch under 7.62 NATO NO-GO dimensions, ensuring a safe chamber size before firing.
Interchangeable gauges are available for different calibers, sharing the same Stock #, making the Forster gauges versatile for various cartridge sizes.