HM Defense HM50B2 Gen2 .50 BMG, 29.25 in, 10 + 1

The HM Defense HM50B2 Gen2 .50 BMG, 29.25 in, 10 + 1 is a semi-auto precision rifle that delivers repeatable sub-MOA accuracy at extreme distances. Built on a reinforced aluminum receiver and a match-grade, button-rifled barrel, this Gen2 evolution sheds weight while increasing structural rigidity. It ships with a 10-round magazine, a removable monopod mount, and the HM Precision adjustable stock—a steel through-bolted system with an adjustable comb and length of pull. For shooters who demand consistent hits past 1,500 meters, this is the platform.

Key Features

• Match-Grade, Button-Rifled Barrel: 29.25-inch barrel with a 1:15 twist rate delivers consistent bullet stabilization for .50 BMG projectiles, minimizing vertical dispersion at 1,000+ yards.
• HM Precision Adjustable Stock: Steel through-bolted mounting eliminates flex; adjustable comb and length of of pull allow a perfect cheek weld for repeatable head position shot after shot.
• Removable 1913 Picatinny Rail & Monopod Mount: Accepts any standard rear monopod for stable offhand or prone support, plus the rail stays rigid under recoil.
• Gen2 Weight Reduction & Strengthened Receiver: HM Defense removed material in non-critical areas and reinforced the aluminum receiver around the barrel extension—cuts 1.2 lbs from Gen1 while increasing lifespan by an estimated 30% per manufacturer fatigue tests.
• 10-Round Magazine Included: Double-stack steel magazine feeds reliably and locks back on empty, giving you sustained fire capability without constant reloads.

Who It’s For

This rifle is for the long-range shooter who has outgrown .308 and .338 Lapua and needs a semi-auto .50 BMG that holds zero under sustained fire. It suits competition ELR shooters, military/law enforcement precision marksmen, and serious hobbyists who reload and document DOPE cards. If you run a Barrett M82 or M107A1 and want a lighter, more accurate alternative, this is your upgrade.

Pros & Cons

• Pro: Sub-MOA accuracy out of the box with match ammo—verified by multiple independent testers at 200 yards.
• Pro: Adjustable stock and monopod mount eliminate the need for aftermarket chassis upgrades.
• Pro: 10+1 capacity gives you more follow-up shots than most bolt-action .50s.
• Con: At 29.5 lbs unloaded, it’s heavy for patrol or vehicle carry—best for static positions or bipod/prone use.
• Con: Magazine availability is limited to the included 10-rounder; no aftermarket extended mags exist yet.

Comparison: HM Defense HM50B2 Gen2 vs. Barrett M82A1 vs. Armalite AR-50A1

FAQ

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• ✔ Nationwide delivery (all 50 states)
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Browse more in our Semi Auto Rifles collection or check out Long Range Rifles and .50 BMG Rifles.

Last updated: April 2026