Ar-15 Pistol M Lok 300 Blackout 7 5 301 Hard Coat Anodized Buffer Tube Stock

About this product

This is Combat Armory's complete AR-15-pattern pistol chambered in .300 Blackout, built around a 7.5-inch barrel and an M-LOK free-float handguard rather than sold as a parts kit - it's a finished, ready-to-fire pistol rather than something you assemble yourself. At $499.99, it's priced as an entry point into the .300 Blackout pistol category rather than a premium build.

What is .300 Blackout, and why pair it with a short barrel pistol?

.300 Blackout was designed to run reliably out of short barrels - including barrels this short - while still cycling the same AR-15 bolt carrier group and magazine well as 5.56/.223, which is why short-barreled AR pistols are so commonly chambered in it instead of 5.56. A 7.5-inch barrel is on the shorter end even for .300 Blackout, which trades some velocity for a more compact, maneuverable pistol.

What's the receiver and handguard made of?

Combat Armory builds this pistol on a 7075-T6 aluminum upper and lower receiver set with a hard-coat anodized black finish, which matches mil-spec material and finish standards used across the AR-15 platform. The handguard is M-LOK compatible and free-floats around the barrel, letting you mount lights, lasers, or foregrips without contacting the barrel itself and affecting accuracy.

Does it come with a stock or a brace?

This configuration ships with a pistol buffer tube and stock setup rather than a stabilizing brace - meaning it's built and sold specifically in pistol configuration under current ATF pistol-brace rules. If your plans for the gun involve a brace or a different stock setup down the line, check current ATF rules on pistol braces before making any changes, since that regulatory area has shifted multiple times in recent years.

What magazine and capacity does it ship with?

It comes with a 30-round magazine loaded with .300 Blackout in mind - the same magazine body as 5.56 AR-15 magazines, since .300 Blackout was designed to work through unmodified AR mag wells. California law limits magazine capacity to 10 rounds regardless of what ships from the manufacturer, so confirm with your FFL which magazine you'll actually be able to take home.

Shooters build or buy short-barreled .300 Blackout pistols like this one primarily for home-defense and range use in a package that's easier to maneuver indoors than a full 16-inch-barrel rifle, often paired with a suppressor since .300 Blackout is one of the quieter common calibers to run suppressed. If a suppressor is part of your plan, remember that's a separate NFA item with its own application and tax stamp process, not something this listing includes. Ammunition for .300 Blackout is widely available in both subsonic and supersonic loadings, which is part of the caliber's appeal for a short-barrel pistol like this one - supersonic loads for general use and subsonic loads if you're running it suppressed.

How does the purchase process work in California?

Because this is a complete pistol rather than a stripped receiver or parts kit, it's a firearm and must transfer through a licensed FFL - it cannot ship to your home address. AR-pattern pistols and their configuration (barrel length, brace vs. stock, overall length) are an area of California law that has changed over time, so confirm this specific configuration's current legal status with your FFL before ordering. Checkout on this site runs through secure checkout, and FFL transfer fees are set separately by the receiving dealer.