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War Lock Multiple Caliber SystemWar Lock Upgrade Kit

War Lock Multi-Caliber Kit


The War Lock™ Multi-Caliber Kit transforms your AR platform into the Multiple Caliber System.

NOTE: Our products are made to order.
Please allow up to 30 days for delivery.

Select Barrel Type and Quantity below. Select “Pack of Two Kits” for a discount!

War Lock Complete Upper Receiver 2War Lock Complete Upper Receiver

War Lock Complete Upper Receiver


Save time & labor with the fully assembled War Lock™ Complete Upper Receiver. This product comes with an enlarged ejection port to accommodate calibers up to and including .50 Beowulf.

NOTE: Does not include Barrel Adapter Assembly, Installation Fixture, Transportation/Storage Cap, Handguard Retainer Assembly, Charging Handle, or BCG.

Installation FixtureInstallation Fixture

Installation Fixture


The War Lock™ Installation Fixture is used for the installation of the War Lock™ Barrel Adapter Assembly and for the installation of muzzle devices.