HM Defense HM50B2 Gen2 .50 BMG, 29.25 in, 10 + 1
$5,873.31
The HM Defense HM50B2 Gen2 .50 BMG semi-auto rifle delivers sub-MOA accuracy at extreme ranges with a match-grade, button-rifled barrel and fully adjustable stock. Includes a 10-round magazine and monopod mount for precision ELR shooting.
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.
| Manufacturer | HM Defense |
|---|---|
| Model | HM50B2 Gen2 |
| Material | Machined aluminum receiver, steel barrel (per manufacturer specs) |
| Compatibility | .50 BMG ammunition; accepts 1913 Picatinny accessories |
| Finish | Hardcoat anodized aluminum, black oxide steel |
| Weight | Approximately 29.5 lbs |
| Condition | New |
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
| Feature | HM Defense HM50B2 Gen2 | Barrett M82A1 | Armalite AR-50A1 |
|---|---|---|---|
| Action | Semi-auto, gas-operated | Semi-auto, short-recoil | Bolt-action |
| Barrel Length | 29.25 in | 29 in | 30 in |
| Weight | ~29.5 lbs | ~30.9 lbs | ~28.5 lbs |
| Stock Adjustability | Full (comb, LOP, monopod) | Fixed comb, LOP only | None |
| Accuracy Guarantee | Sub-MOA (manufacturer claim) | 1.5–2 MOA | Sub-MOA |
| Capacity | 10+1 | 10+1 | 5+1 |
| Price | $5,244.03 | $8,200+ | $3,800+ |
FAQ
What is the accuracy of the HM Defense HM50B2 Gen2 at 1,000 yards?
Per HM Defense specs, the Gen2 is rated for sub-MOA accuracy with match-grade .50 BMG ammunition. Independent shooters have reported consistent 0.8–0.9 MOA groups at 200 yards, which translates to approximately 8–9 inches at 1,000 yards—well within first-round hit capability for a 20-inch target.
Does the HM50B2 Gen2 come with a scope or optics?
No, the rifle ships without optics. The upper receiver has a 1913 Picatinny rail for mounting your own scope and rings. We recommend a 5–25x or higher magnification scope with MIL or MOA reticle for ELR use.
Is the HM Defense HM50B2 Gen2 legal to own in all states?
It is a semi-auto rifle chambered in .50 BMG, so it is legal in most states but restricted in California, Connecticut, Hawaii, Maryland, Massachusetts, New Jersey, New York, and Washington D.C. Check your local laws before ordering. We ship to all 50 states but cannot ship to restricted addresses.
Can I use this rifle for hunting?
Yes, but .50 BMG is overkill for most North American game and is illegal for hunting in many states due to caliber restrictions. It is primarily designed for long-range target shooting, competition, and tactical applications.
What maintenance does the HM50B2 Gen2 require?
Clean the barrel and gas system after every 100 rounds to prevent carbon fouling buildup. Lubricate the bolt carrier group with high-temperature grease. The adjustable stock’s steel through-bolts should be checked for torque every 500 rounds.
Why Buy From Us
- ✔ Nationwide delivery (all 50 states)
- ✔ Ships 1-2 business days
- ✔ 30-day returns
- ✔ Secure checkout
Browse more in our Semi Auto Rifles collection or check out Long Range Rifles and .50 BMG Rifles.
Last updated: April 2026
Related products
-
Weatherby MARK V Live Wild CF .243 Win 22″ Rifle
$3,470.88Add to cartWeatherby MARK V Live Wild CF .243 Win 22″ Rifle: a sub-7-pound precision hunter with a BSF #4 carbon-fiber barrel, Peak 44 Bastion stock, and Weatherby’s legendary 9-lug Mark V action. Sub-MOA guarantee, threaded muzzle, and Carbon Gray Cerakote finish – ready for the mountains or the range.
-
Browning BAR MK3 Stalker Rifle 308 Win 22 in. Synthetic Black
$1,384.61Add to cartThe Browning BAR MK3 Stalker Rifle 308 Win 22 in. Synthetic Black delivers sub-MOA accuracy with a short-stroke gas piston that runs clean and reduces recoil, perfect for long-range hunting and precision shooting.
-
DIA DB175AK063 556 DB15 16 30R B5 MLTI CAM
$792.90Add to cartFactory-built Diamondback DB15 in Multicam Cerakote with B5 Systems Bravo furniture, 16-inch barrel, and 30-round PMAG. Ready to run with free-float M-Lok handguard and QD sling mounts at $707.95.
-
DESERT TECH SRS-M2 .308 26-inch Precision Rifle
$6,522.88Add to cartGet sub-MOA accuracy and multi-caliber flexibility with the Desert Tech SRS-M2 .308 26-inch precision rifle. Features a 30 MOA rail, adjustable monopod, and quick barrel swaps for long-range dominance.
Reviews
There are no reviews yet.