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Slide Frontier Tactical, War Lock, Multiple Caliber System Learn More “FLEXIBLE FIREPOWER” MODULAR. ADAPTABLE. TOUGHER THAN NAILS. Slide Frontier Tactical, War Lock, Multiple Caliber System YOUR AR-15 JUST GOT AN UPGRADE. Learn More “flexible firepower” FIRE MORE THAN 90 CALIBERS. Slide Veteran-Owned Absolutely redefining the capabilities of the AR15/M4/M16 platform. Learn More Departing from the Known MADE IN USA

“flexible firepower”

Nothing says “flexible firepower” better than the ability to change out your caliber at will. Our patented War Lock™ system allows you to break down your weapon, change the bolt and barrel, then fire downrange with your new caliber – all with the same AR-15 upper and lower.

War Lock™  UPGRADE KITS

War Lock™ MADE IN USA

War Lock™  UPGRADE KITS

Our multi-caliber system is the best product on the market.

Fits – Mil-spec AR-15 upper receiver and barrels. Finish – Black Nitride.

War Lock Upgrade Kit

War Lock™   BASICS

Add the War Lock™   The barrel is now removable and makes it easy for discreet carry.
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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 caliber range from just the .223/.556 standard, 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. 

War Lock™ Installed Option

MODULAR.  ADAPTABLE.  TOUGHER THAN NAILS.
FTP-15 PISTOL

The FTP15 is the Frontier Tactical Pistol line of products. It is an optic-ready, dedicated entry-level AR-15 pistol that includes a few upgrades, but leaves the AR-15 ready for further modification.

FT-15 Rifle

The FT15 BASE RIFLE is the Frontier Tactical Rifle entry-level line of products. It is an optic-ready, dedicated entry-level AR-15 rifle that includes a few upgrades, but leaves the AR-15 ready for further modification. The lower receiver is marked “MULTI CAL” and is a semi-auto AR-15 rifle.

Private: FT-15 Multiple Caliber
***A Federal Firearms License (FFL) is required to purchase this item.***

The Frontier Tactical™ FT-15 Multi-Caliber Packages include all the barrels, bolt carrier groups, and magazines with the rifle that are necessary to switch between the included calibers.