Henry Big Boy Mare’s Leg Side Gate Handgun .45 Colt 5rd Capacity 12.9″ Barrel Walnut
$999.42
The Henry Big Boy Mare’s Leg is a unique .45 Colt handgun featuring a 12.9″ barrel and a 5-round capacity, designed with a large loop lever for enhanced handling. Built in the USA, it showcases a select handcrafted American Walnut stock, reminiscent of the iconic firearm used in the television series, making it an excellent choice for collectors and fans of Western-style firearms.
6 in stock
Built in the USA to Henry’s world-renowned standards of quality the Mare’s Leg is a modified variation of the Henry Big Boy Brass Side Gate and available in .357 Magnum.
Like all Henry Rifles each Mare’s leg sports a select handcrafted American Walnut stock cut to the exact specification of the gun used on the television series. The large loop lever and the legendary crisp Henry action make it easy to enjoy those rapid-fire repeating shots.
Like the full-sized rifles these pistols are based on the Mare’s Leg features a side loading gate on its gleaming brass receiver allowing you to keep the five-round tube magazine fully loaded on the fly. Henry also retained their removable magazine tube making for safe and easy unloading after a day at the range.
| Weight | 6.700 lbs |
|---|---|
| Dimensions | 28.500 × 6.500 × 2.000 in |
| Manufacturer | Henry Repeating Arms Company |
| Caliber | .45 Colt |
| Barrel Length | 12.9 |
| Capacity | 5 |
| Action | Lever-action |
| Finish | Brass |
| Frame Material | Steel |
PROCESSING & SHIPPING
Orders typically ship within 1–3 business days (Monday–Friday) after payment and all required documentation are received. Time to arrival after shipment depends on the carrier. Shipping method is at BT Gun Company’s discretion; ammunition and oversized accessories are charged at actual shipping cost. We do not ship to Hawaii or Alaska.
FIREARM TRANSFERS
- Firearms must ship to a licensed FFL dealer of your choosing — confirm with them first that they can accept the transfer.
- Your receiving FFL will need to email their license to [email protected] before we can ship.
- Inspect your firearm at your FFL’s location before signing ATF Form 4473 — once signed, the firearm is considered accepted.
You’re responsible for knowing the firearms laws in your state before ordering. For complete shipping, returns, and restocking-fee policy details, see our Shipping & Returns page.

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