Introducing Big Horn Armory’s ATF-Compatible AR500 Pistol

Big Horn Armory has recently removed the stabilizer pistol clamp from its AR500 pistol to comply with the recent ATF ruling. Any AR500 pistol purchase made at the Big Horn Armory between January 23 and 29, 2023 will receive a ten percent discount on the order.

In light of the recent ATF final rule on pistol clamps, Big Horn Armory (BHA), makers of large-caliber firearms, has updated its AR500 pistol with the removal of its stabilizer clamp. To help other firearm owners remain ATF compliant and avoid inadvertently becoming felons due to the new ruling, the BHA is offering a limited time offer on its updated AR500 pistol. Any new BHA AR500 semi-automatic pistol purchased directly from the website between January 22-29, 2023 will receive a ten percent discount on the purchase. BHA is currently shipping the AR500 from stock and a service representative will contact you within 48 hours to discuss options.

Based on the innovative AR500 rifle, the AR500 pistol is a large frame AR chambered in 500 Auto Max. This cartridge, in combination with the BHA AR500 pistol, puts an unprecedented amount of power into an exceptionally compact, fast-firing, pleasing firearm. This combination of size, maneuverability, and on-target power makes the AR500 easily accessible and ready to handle almost any situation.

The 500 Auto Max is a rimless 500 S&W Magnum that is easy to get or reload. A very versatile cartridge, it can be had in ammunition loaded with bullets ranging from 350 grns to an amazing 600 grns. The manual loader can take over 55 different bullets ranging from 200gm to 700gm in almost any type of bullet imaginable including hard cast, hollow point, solid monolithic, etc. This unprecedented variety of weight and bullet design make the AR500 suitable for anything from prairie dogs to pachyderms to Peterbilts. Truck stopping power in a platform that weighs less than 10 lbs. Factory ammunition for the 500 Auto Max is available through Buffalo Bore, Steinel Ammunition, and Underwood Ammunition.

Whether you’re packing 36,800 ft. lbs. of power in a lever action, or building the most powerful AR on the market, BHA’s goal is to give the customer the most bang for their buck.

Take advantage of these offers by visiting, calling 307-586-3700 or emailing

For more information about Big Horn Armory, please visit or any of its social media platforms: Facebook, Instagram, YouTube, MeWe, LinkedIn, Parler, Locals, or Twitter.

About the Big Horn Armory:

Big Horn Armory was founded in 2008 with the express intention of designing a Browning-type lever action weapon chambered in 500 Smith & Wesson Magnum. Big Horn Armory’s American-made Model 89 closely follows the work of John Browning with refinements courtesy of modern metalworking and machining capabilities. The first rifles began shipping in September 2012, and since then, BHA has added to its large-bore lineup a Model 90 Carbine in 460 S&W, Model 90A in 454 Casull, Model 90B in .45 Colt, Model 89A in 500 Linebaugh and the Model 89B in .475 Linebaugh. In 2017, Big Horn Armory departed from its lever-action series and developed the AR500 Auto Max, the most powerful short-range semi-auto based on an AR .308 platform.