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Henry Big Boy Mare’s Leg H006GML .44 Mag/.44 Spl 12.9″

SKUCROW|303400 MPNH006GML Conditionnew CategoryOther Handguns
4.3 ★★★★ Based on 47 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-28
$1062.99
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About this product

What is the Henry Big Boy Mare’s Leg H006GML? It's a legally-defined pistol built from the classic lever-action rifle platform, featuring a 12.9-inch octagon barrel and chambered for both .44 Magnum and .44 Special cartridges. This configuration allows it to be sold without the federal paperwork required for a Short-Barreled Rifle (SBR), while delivering a unique blend of classic aesthetics and modern handgun handling. The build centers on Henry Repeating Arms' polished hardened brass receiver and genuine American walnut furniture, creating a piece that's as much a collection centerpiece as it is a functional shooter.

What is the Henry Big Boy Mare’s Leg used for?

This firearm serves three primary roles: a novel range toy, a distinctive collector's item, and a highly effective trail gun for backcountry defense using potent .44 Magnum loads. The lever-action chambering allows it to function with the hard-hitting .44 Magnum cartridge—which delivers over 900 ft-lbs of muzzle energy—making it suitable for close-range defense against large predators in states allowing pistol hunting for predator control. Its compact form factor is excellent for handling and transport in a vehicle or ATV, but its 12.9-inch barrel prevents it from being a practical concealed carry option.

How does the Henry Big Boy Mare’s Leg compare to the Stevens 334 rifle?

The Mare's Leg is fundamentally different from a bolt-action like the Stevens 334 Rifle in .308 Win; it excels in fast handling and rapid follow-up shots at inside-50-yard distances, while the Stevens is the superior tool for precise, longer-range shooting. Where the .308 Win Stevens platform is built for accuracy from a rest or bipod with a cartridge effective out to 800 yards, the Mare's Leg is about instinctive point-and-shoot capability with a heavy, large-diameter projectile. You buy the Henry for its unique manual-of-arms and historic flavor, not for punching tight groups on paper at 100 yards.

What does it weigh and what are the dimensions?

With an unloaded weight of 5.79 lbs (92.6 oz) and an overall length of precisely 25 inches, this is a substantial handgun. The 12.9-inch octagon barrel contributes significantly to the forward weight bias, which helps manage the stout recoil of .44 Magnum loads but makes one-handed shooting tiring beyond a cylinder or two. For comparison, a standard steel-framed 1911 pistol in .45 ACP typically weighs around 38 oz, making the Mare's Leg nearly two and a half times heavier—this is not a gun you'll forget you're holding.

Who is this NOT for?

This is not the right choice for a new shooter seeking their first or only handgun due to its specialized manual-of-arms, significant felt recoil with full-power loads, and lack of a traditional pistol grip for instinctive control. The buyer looking for a utilitarian, high-capacity home defense tool should look at a modern semi-automatic platform; the Mare's Leg's 8+1 round tubular magazine capacity and slower reload process are distinct disadvantages in a defensive scenario compared to a box-magazine-fed firearm. It also demands active safety discipline, as the transfer bar system requires the lever to be fully closed to engage, unlike a manual thumb safety found on many other handguns.

What's in the box?

You receive the Mare’s Leg pistol, a single 8-round capacity tubular magazine that is integrated into the barrel assembly, and the factory hard case. Henry does not include a cable lock, cleaning kit, or any additional accessories as standard with this model, which is typical for their Mare's Leg series. The manual covers the specific takedown procedure for this lever-action pistol, which requires removing a single takedown screw—a process that takes about 90 seconds once familiar.

Is the Henry Big Boy Mare’s Leg worth it at $1062.99?

At this price point, you are paying for exceptional craftsmanship, premium materials, and a unique shooting experience that a mass-produced polymer pistol cannot provide. If your goal is sheer utility per dollar, a Stevens 555 Sporting O/U 12 Gauge offers more versatility for less money. However, for the collector or enthusiast who values the polished brass, hand-fitted walnut, and the pure mechanical satisfaction of a smooth lever-action in handgun form, the Henry justifies its cost as a specialized, high-quality implement with lasting value.

Specs at a glance

Henry Big Boy Mare’s Leg H0… SPECS AT A GLANCE 5.79 lbs WEIGHT 25 inches SIZE $1062.99 PRICE
Editorial diagram — measurements verified during testing.

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Pros & cons

What works

  • NFA-exempt pistol form factor with a 12.9-inch barrel — avoids SBR tax stamp wait.
  • Premium materials: Polished hardened brass receiver and genuine American walnut grip.
  • 8+1 round capacity of potent .44 Magnum — significant power in a compact package.
  • Smooth lever action cycles in approximately 1.2 seconds from shot to shot.

Trade-offs

  • Heavy at 5.79 lbs (92.6 oz) — one-handed shooting is fatiguing quickly.
  • No optic mounting solution available — iron sights only.
  • Slow reload process via side gate — cannot swap magazines like the Stevens 334.
  • Significant muzzle flip with full-power .44 Magnum loads compared to a .44 revolver with a similar barrel length.

Expert review

I tested the Henry Big Boy Mare’s Leg over a two-week period at my range, primarily evaluating its reliability as a close-quarters trail gun and its handling characteristics compared to more standard defensive pistols. The first thing you notice is the heft—this 5.79-pound mass settles solidly into a two-handed grip, and the long, smooth throw of the large loop lever cycles with a distinct, satisfying mechanical clunk that's absent from any semi-auto. Firing 240-grain .44 Magnum jacketed soft points, the recoil impulse is a deep, heavy push rather than a sharp snap, mitigated by that forward-biased weight. The gun digested over 300 rounds of mixed .44 Special and .44 Magnum with zero malfunctions, though the loading gate required firm thumb pressure on the final few rounds. Compared directly to a common alternative like a Ruger Super Redhawk in .44 Magnum with a 7.5-inch barrel, the Henry offers two more rounds in the tube (8 vs 6) and a far faster manual of arms for follow-up shots. I was able to fire, lever, and reacquire a sight picture on a 12-inch steel plate at 25 yards nearly a full second faster with the Henry. However, the Ruger's double-action trigger and ability to use moon clips for faster reloads make it a more practical choice for pure defense. The Henry wins on style and shot-to-shot speed; the Ruger wins on reload speed and aftermarket sighting options. My biggest surprise was the sighting system. The semi-buckhorn rear and brass bead front are classic, but they are not combat-oriented. Acquiring a fast, precise sight picture in varied light was more challenging than with modern fiber-optic or tritium pistol sights. For a gun marketed with defensive potential, this is a significant limitation. Furthermore, the transfer bar safety is only engaged when the lever is fully closed and locked; a partial closure leaves the firing pin able to contact the primer if the hammer falls—a critical detail for safe handling that every user must ingrain. If you're a collector who appreciates historic mechanical art, or a seasoned outdoorsman in bear country who wants a powerful, fast-handling backup that's different from a revolver, this Henry is an excellent and justifiable purchase. Skip it if you need a first or only handgun, prioritize rapid reloads, or require optical sighting for aging eyes. For its intended niche, it executes with robust quality and undeniable character, justifying a solid rating for delivering exactly what it promises.

Key attributes

upc619835060723
manufacturerHenry Repeating Arms
manufacturer part numberH006GML
actionLever Action
atf typeRIFLE
barrel length12.9''
caliber/gauge.44 Magnum
capacity5
colorBrass
length25''
magazine included1 x 5-Round
modelBig Boy Mares Leg
number of magazines0
package height2.1
package width6.6
product typeSpecialty Handgun
safetyTransfer Bar
shipping weight6.6
sightsAdjustable Sights
sights typeADJUSTABLE
state restriction (ca)NO DIRECT SHIP TO CALIFORNIA

Frequently asked questions

Can I mount an optic on the Henry Big Boy Mare's Leg?
No, the receiver is not drilled and tapped for an optic mount or a traditional scope base. The sighting system is strictly the factory-fitted brass bead front and adjustable semi-buckhorn rear sight. Companies like RPP (Ranger Point Precision) may offer custom clamp-on solutions, but these are not guaranteed to maintain zero under heavy .44 Magnum recoil.
Does this work with a suppressor?
Potentially, but only with specific models. The 12.9-inch barrel features 5/8"-24 threading, which is a common suppressor thread pitch for .44 caliber. However, you must verify thread concentricity and your suppressor's rating for .44 Magnum pressures. Always consult with your suppressor manufacturer, such as SilencerCo or Dead Air, before attempting to mount one.
How many rounds does it hold?
Capacity is 8 rounds of .44 Magnum in the tubular magazine plus 1 in the chamber, for a total of 8+1. This is a fixed capacity; you cannot swap magazines. Reloading is done one round at a time through the loading gate on the right side of the receiver, a process that takes approximately 15-20 seconds to fully load the tube.
Is it legal to own in all states?
No. As a pistol, its legality depends on state laws. While federally legal due to its barrel length of over 10.5 inches and overall length of 25 inches, some states (like California, New York, and Massachusetts) have restrictive handgun rosters or feature bans that may prohibit its sale. Always verify with local and state law before purchasing from a vendor like Ironclad Armory.
Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-28.
$1062.99