The HM Defense HM50B2 Gen 2 is a semi-auto rifle chambered in .50 BMG, built by Luxus Arms (HM Defense) in a flat dark earth finish for serious long-range shooters (brand part no. HM50B250BMGFDE). This Gen 2 model pairs a button-rifled, threaded 29.25-inch barrel with a 1:15-inch twist rate to stabilize heavy .50 BMG bullets at extended distance, all mounted to a lightweight aluminum receiver. A 14-inch Picatinny rail runs the length of the forend for mounting a serious long-range optic, while the HM Precision adjustable, CNC-machined stock and ERGO Tactical Super Ambi grip let shooters dial in fit for prone or supported positions. The HM Target trigger delivers a crisp, consistent break that helps extract every bit of accuracy from the big-bore cartridge, and a removable monopod mount adds extra rear-bag stability for precision work. Built for long-range steel, hunting, or serious .50 BMG enthusiasts, it ships in a hard case with laser-cut foam to protect the investment.

Key Specifications

• Chambered in .50 BMG, one of the hardest-hitting long-range cartridges available to civilian shooters.
• Fitted with a 29.25-inch barrel for maximum velocity from the big .50 BMG cartridge.
• Barrel is button-rifled for tight, consistent tolerances that support long-range accuracy.
• Barrel is threaded for easy installation of a muzzle brake or suppressor.
• Rifled at a 1:15-inch twist rate to stabilize standard .50 BMG bullet weights.
• Feeds from a 10-round magazine, giving a 10+1 capacity when a round is chambered.
• Built on a lightweight aluminum receiver to help offset the weight of a full-length .50 BMG barrel.
• Topped with a 14-inch Picatinny rail for mounting long-range optics.
• Equipped with an HM Target trigger for a crisp, consistent break.
• Fitted with an ERGO Tactical Super Ambi grip for comfortable, ambidextrous control.
• Uses an adjustable, CNC-machined HM Precision stock to dial in length of pull and comb height.

Frequently Asked Questions

What does it come with? It ships with a 10-round magazine, a removable monopod mount, and a hard case with laser-cut foam.

Is it optics-ready? Yes, a 14-inch Picatinny rail runs the length of the forend for mounting a long-range scope.

Can the stock be adjusted? Yes, the HM Precision stock is CNC-machined and adjustable to fit the shooter.

Buy the HM Defense HM50B2 Gen 2 .50 BMG Semi-Auto Rifle, FDE

For shooters who want serious .50 BMG performance in a purpose-built semi-auto package, the HM50B2 Gen 2 is a standout in our HM Defense lineup within our semi-auto rifle selection. Contact our Lubbock, Texas gun shop to place your order and arrange fast, insured shipping to your FFL as soon as it’s available to ship.