Description
Few rifles turn heads at the range like a brass-framed Henry, and the Big Boy Brass Side Gate in .45 Colt might be the best-looking one of the bunch. The polished hardened brass receiver, brass barrel band, and brass buttplate play beautifully off the deep blued 20 inch octagon barrel, while the straight-grip stock and forearm are cut from select American walnut. It looks like something out of the 1880s, but it runs like a modern rifle should, with the smooth cycling and clean trigger Henry has built its reputation on.
Two Ways to Load the Big Boy Side Gate
For years, Henry fans asked for a side loading gate, and this model delivers without giving anything up. You can feed rounds through the gate on the right side of the receiver to top off without ever breaking your shooting position, or use the traditional removable tube magazine when you want to unload safely without cycling every round through the action. The tube holds 10 rounds of .45 Colt, and that big straight-walled cartridge picks up a healthy velocity boost out of the 20 inch barrel compared to a revolver, making this a legitimate short-range hunting rig as well as a range gun.
Sights and Handling on the Henry Big Boy Brass
Up top you get a fully adjustable semi-buckhorn rear sight with a reversible white diamond insert and a brass bead front, a setup that is quick to pick up and easy to fine tune. The receiver is also drilled and tapped, so adding a scope base later is simple if your eyes prefer glass. At 38.5 inches overall and roughly 8.7 pounds, it carries some pleasant heft that soaks up the already mild recoil of .45 Colt, so long range sessions stay comfortable.
Whether you shoot cowboy action matches, hunt hogs and deer inside 100 yards, or just appreciate a well-built piece of Americana, this is a rifle you will find excuses to take out. Made in the USA and backed by Henry's well-earned reputation for standing behind their guns.
Key Specifications
- Manufacturer: Henry Repeating Arms
- Model: Big Boy Brass Side Gate
- MPN: H006GC
- UPC: 619835060631
- Caliber: .45 Long Colt
- Action: Lever Action
- Capacity: 10+1 Rounds
- Barrel: 20" Blued Octagon
- Twist Rate: 1:16"
- Receiver: Polished Hardened Brass
- Stock: Select American Walnut, Straight Grip
- Sights: Adjustable Semi-Buckhorn Rear, Brass Bead Front
- Safety: Transfer Bar
- Overall Length: 38.5"
- Weight: 8.68 lbs
- Length of Pull: 14"
What’s Included
- Henry Big Boy Brass Side Gate rifle
- Owner's manual
Frequently Asked Questions
Can I load the Henry Big Boy Brass Side Gate through the tube and the gate?
Yes, and that is one of the biggest draws of this model. You can feed rounds through the side loading gate to top off the magazine from your shoulder, or pull the removable inner tube to load and unload the traditional Henry way. Unloading through the tube is especially handy since you never have to cycle live rounds through the action.
Is the Henry Big Boy in .45 Colt suitable for deer hunting?
Inside about 100 yards, absolutely. The 20 inch barrel squeezes noticeably more velocity out of .45 Colt than a revolver, and a heavy flat-nose bullet at those speeds is plenty for whitetail and hogs at woods distances. Just keep your shots close and pick a quality hunting load.
Can I mount a scope on the Big Boy Brass Side Gate?
Yes. The receiver comes drilled and tapped from the factory, so you can add a Weaver 63B style base and rings without any gunsmithing. Many owners stick with the adjustable semi-buckhorn sights, but the option for glass is there if you want it.
Does the brass receiver hold up to regular shooting?
It does. Henry uses a hardened brass alloy for the receiver, and .45 Colt is a mild, low-pressure cartridge, so wear is not a concern with normal use. The polished finish will develop a mellow patina over time unless you wipe it down, which some owners consider part of the charm.





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