Henry Big Boy Brass Side Gate 357 Mag 20" Barrel 10 Round Capacity H006GM

$1,049.00 $899.00


Back when the West was still wild, the lever action rifle cemented its position as the tool of choice for wilderness survival and frontier justice. Rugged, trim, and reliable, lever guns put more meat on the table and outlaws behind bars than any other firearm.

Though the West was tamed and fenced long ago, its spirit finds new life in the Henry Big Boy. Don’t let the vintage aesthetics fool you, these pistol-caliber lever guns are designed for the modern enthusiast.

In the past, we’ve taken design cues from the original 1860 Henry Repeater, opting to utilize a removable tube magazine. Now, the Big Boy’s polished brass receiver sports a side loading gate, allowing you to top off the tube magazine without dropping the rifle from your shoulder. We’ve also retained the traditional magazine tube for safe and easy unloading. With both loading options at your disposal, you’ll always have your rifle at the ready.

Available in a suite of traditional calibers, the choice between .44 Magnum, .357 Magnum, and .45 Colt is yours. Classic pistol cartridges see considerable performance improvements when fired from the Big Boy’s 20” blued steel octagonal barrel, making these rifles a versatile tool to Protect and Provide. In addition, a fully adjustable semi-buckhorn rear sight with a reversible white diamond insert, paired with a brass beaded front sight, makes target acquisition effortless.

True to Henry form, these rifles are constructed with exquisite attention to detail, using fine American-made components. Both the straight-grip stock and forearm are crafted of select American walnut accented with a polished brass barrel band and Henry’s signature polished hardened brass receiver. All have the smooth action and crisp trigger that distinguishes an authentic, American-made Henry.

For those looking to experience an undisputed piece of Americana, whether it’s at the range, in the field, or on a cowboy action stage, the Big Boy Brass Side Gate is guaranteed to bring out the West in you.


Model Number


Action Type

Lever Action


.357 Magnum/.38 Spl


10 Rounds

Additional Specifications

Barrel Length


Barrel Type

Octagon Blued Steel

Rate of Twist


Overall Length



8.68 lbs.

Receiver Finish

Polished Hardened Brass

Rear Sight

Fully Adj. Semi-Buckhorn w/ Diamond Insert

Front Sight

Brass Bead


Drilled and Tapped

Scope Mount Type


Stock Material

American Walnut



Length of Pull



Transfer Bar

Best Uses



Side Loading Gate

Categories: Lever Action Rifles
Condition: New
Manufacturer: Henry Repeating Arms
Model: Big Boy Brass Side Gate
Caliber: 357 Mag
SKU: 619835060655
UPC: 619835060655
Vendor: Gunprime
Reviews (3)
By Roy Ballard on 01/25/24
I havn't seen the rifles yet

I've read alot about Henry and have always wanted one

By Harold Rice on 12/05/23
Purchase made in a timely manner

It’s a Henry

By TL on 09/28/23
Great Rifle

Great rifle so far! The side gate loading as well as the tube loading is nice. The recoil with the 357 magnum is hardly noticeable and the 38 special feels like you’re shooting a 22.
The longer barrel (octagon) is nice for the extra rounds and accuracy and the weight isn’t too bad, if anything it makes the recoil even less.
The brass is great and the regular size lever loop makes quick lever action for this smooth out of the box rifle. The only thing I changed was putting a skinner sight on to replace the semi-buckhorn sights but that’s personal preference.

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