Henry Big Boy Mare’s Leg Lever-Action Pistol .45 Colt Octagon Barrel

The Henry Big Boy Mare’s Leg (brand part no. H006GCML) is a lever-action pistol chambered in .45 Colt with a 12.9-inch octagon barrel and a 5-round tubular magazine. Henry Repeating Arms built this pistol on its proven Big Boy action, scaled down and stockless in the classic Mare’s Leg profile, with a side-loading gate for fast reloads and fully adjustable sights for precise point of impact.

Key Specifications

• Chambered in .45 Colt, a classic Old West cartridge.
• Fitted with a 12.9-inch octagon barrel for classic styling and balance.
• Holds 5 rounds in its tubular magazine.
• Runs a lever action with a side-loading gate for faster reloading.
• Rifled with a 1-in-16 twist rate.
• Equipped with a transfer bar safety for secure carry.
• Features fully adjustable sights for dialing in point of impact.
• Measures 25 inches overall, weighing approximately 6.7 pounds.
• Packaged in a compact 2.0-by-6.6-inch retail box footprint.

Frequently Asked Questions

Is the Mare’s Leg a handgun or a rifle? It is ATF-classified as a handgun since it has no shoulder stock, so it ships through a standard FFL transfer like any other pistol.

What is the side gate for? It allows loading additional rounds directly into the magazine tube without unloading through the muzzle.

Is .45 Colt a good choice for this pistol? Yes, .45 Colt offers a wide range of factory loads suited to this pistol’s octagon barrel.

Buy the Henry Big Boy Mare’s Leg Pistol

Add a classic Old West-styled lever-action pistol to the collection with the Henry Big Boy Mare’s Leg (Henry Repeating Arms). Browse more handguns and order yours from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.