Description
Big-bore precision rifles tend to fall into two camps: the ones built like farm equipment and the ones built like instruments. The HM Defense HM50B2 Gen2 lands firmly in the second camp. This is the refined follow-up to the original HM50B, and HM Defense went through the whole platform trimming weight and reinforcing the areas that take the abuse. The upper receiver, lower receiver, and 14 inch free-floated rail are all CNC-machined from aircraft-grade aluminum, with a 7075-T6 billet upper wearing a full-length Picatinny flat top for your optic of choice.
What Sets the HM50B2 Gen2 Apart
The heart of the rifle is a 29.25 inch match-grade barrel, button rifled with a 1:15 twist and an 8-groove profile, finished with a recessed 11-degree target crown and 1-14 TPI muzzle threads. The patented HMB bolt is machined from 9310 steel and runs on the left side with right-side ejection, which lets a right-handed shooter cycle the action without breaking their firing grip or losing their sight picture. That's a real advantage when you're spotting your own impacts at distance. The HM Target trigger breaks clean, and the ERGO Tactical Super Ambi grip keeps the control layout comfortable from behind the gun.
A Stock Built for the Long Game
The biggest Gen2 upgrade is the stock. Instead of a buffer tube and an off-the-shelf unit, HM Defense machined their own precision stock from aluminum and joined it to the lower receiver with a steel through-bolted mounting system. Comb height, length of pull, and butt pad position are all adjustable, and the flat bottom rides a rear bag nicely. There's also a removable 1913 rail section underneath for mounting a monopod. Combined with the HM Recore muzzle brake, the whole setup takes a lot of the sting out of the .50 BMG and makes follow-up shots far more manageable.
HM50B2 Gen2 Out of the Box
At 29.75 pounds bare, this rifle plants itself and stays put. It comes with a 10-round magazine, an HM50 bipod with sled feet, a removable monopod mount, and a hard case with laser-cut foam. Add glass and ammo, and you're set for the 1,000 yard line and well beyond.
Key Specifications
- Caliber: .50 BMG
- Capacity: 10 + 1
- Barrel Length: 29.25 in, match grade, button rifled
- Twist Rate: 1:15 in, 8 groove
- Muzzle Thread: 1-14 TPI
- Overall Length: 56.75 in
- Weight: 29.75 lbs (without optic, bipod, or magazine)
- Receiver: CNC-machined billet aluminum, 7075-T6 upper
- Bolt: Patented HMB bolt, 9310 steel, left-side bolt / right-side ejection
- Stock: HM Precision adjustable CNC-machined aluminum
- Trigger: HM Target trigger
- Grip: ERGO Tactical Super Ambi
- Handguard: 14 in free-floated 1913 Picatinny rail
- Finish: Black Cerakote
- Manufacturer Part Number: HM50B2-50BMG-BLK
- UPC: 854164007463
What’s Included
- HM Defense HM50B2 Gen2 rifle
- One 10-round magazine
- HM50 bipod with sled feet
- Removable monopod mount
- Hard case with laser-cut foam
Frequently Asked Questions
What changed from the original HM50B to the HM50B2 Gen2?
The biggest change is the stock. The first-gen rifle used a buffer tube with a Magpul PRS, while the Gen2 gets HM Defense's own aluminum precision stock joined to the lower with a steel through-bolted mount. HM also lightened and strengthened the receivers and rail, gave the rifle a cleaner modern profile, and beefed up the bolt handle mounting system.
Is the HM50B2 Gen2 a bolt action or semi-auto?
It's a bolt action, with the bolt handle on the left side and ejection out the right port. That layout lets right-handed shooters run the bolt with their support hand while staying on the gun and keeping their eye behind the scope, which is a big help when watching trace and impacts at long range.
Does the HM50B2 come with an optic or scope mount?
No, glass is on you. The 7075-T6 upper has a full 1913 Picatinny flat top plus a 14 inch free-floated rail up front, so mounting a quality long-range scope is easy. You do get a bipod, monopod mount, magazine, and hard case in the package, so the optic is really the only thing left to buy.
How bad is the recoil on a .50 BMG like this?
Less than you'd think. Between the HM Recore muzzle brake, the nearly 30-pound weight of the rifle, and the adjustable butt pad on the aluminum stock, the HM50B2 Gen2 is genuinely comfortable to shoot for a .50. Most people find it noticeably softer than lighter rifles in smaller magnum calibers.





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