These Gauges permit the checking of a barrel extension and barrel headspace without the need for a BCG or even a bolt. This set for AR-10 chambered in 308 Winchester.
$15.00
Muzzle brake tap, AR-15 Flash hiders and other common brakes.
Steel Die is used to chase or re-thread the mounting threads on AR-15 buffer tubes.
1 3/16 – 16 TPI
Multi-Tool you will need when assembling your AR.
for specific muzzle brakes