WE REPLACE THE BARREL NUT WITH THE WAR LOCK™

Barrel Nut
War Lock Upgrade Kit

Add the War Lock™

The barrel is now removable and makes it easy for discreet carry.

Change calibers and barrel lengths.

More bang for your buck. Literally.
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FLEXIBLE FIREPOWER

FIRE MORE THAN 90 CALIBERS

The War Lock™ system expands your AR-15 from just the .223/.556 calibers, to sizes from the .17 Remington all the way to .50 Beowulf rounds. The War Lock can be installed by anyone that is comfortable building an AR15 from parts, and it uses those same tools.

We include in our kits the Installation Fixture for building complete barrel assemblies. The only tools needed to install our kits that we don’t include are a bench vise, AR-15/armorer’s wrench, and receiver blocks/clamps.

To expand your rifle to change 90+ calibers, you only need a complete barrel assembly, a bolt (4 bolts run the majority of rifle calibers), and magazines (some calibers need a different magazine). After installing your complete War Lock kit, the only thing you will need from us is a barrel adapter kit for the barrel you want to add (used to build the complete barrel assembly).

Feel free to shop around for the best prices on gas blocks, barrels, muzzle devices, handguards, and other accessories. We take pride in not creating a proprietary system.