Henry Big Boy X .357 Mag
Model: H012MX
Henry Big Boy X .357 Mag
Model: H012MX
Full Specifications
About This Firearm
The Henry Big Boy X is Henry's answer to a specific buyer: someone who likes the lever-action manual of arms but wants to mount a red dot, run a suppressor, or adjust the stock for different shooters. The X-stock is a synthetic pistol-grip design with adjustable length of pull, the forend is M-LOK compatible, and the barrel is threaded 5/8x24 — the same thread pattern used on most .30-cal suppressors. It chambers .357 Mag and .38 Special.
Compared to the classic Big Boy, the X runs a 17.4-inch barrel versus 20 inches — you give up some velocity, but the 36.3-inch overall length is 2.2 inches shorter and the 116.8 oz weight is 22 oz lighter. The 7-round tube is a real sacrifice. The Winchester 1873 and Rossi R92 both hold 10 from a 20-inch barrel; if suppressor use isn't in your plans, those rifles make more sense. The fiber optic sights are an improvement over the classic's brass bead for general-purpose use.
The shorter tube is a direct consequence of the shorter barrel, and it puts the X behind every other .357 Mag lever in this group. If round count matters, the X asks you to accept a real penalty. The compensating strength is suppressor compatibility: lever actions are already quiet with subsonic .38 Special loads without a can, and adding a suppressor to the threaded barrel makes this one of the quieter centerfire rifles you can own without going semi-auto.
Best For
Strengths & Limitations
- The 5/8x24 threaded barrel, M-LOK forend, and Picatinny rail make this the only lever-action in the .357 Mag group ready for suppressor use and accessory mounting without additional machining.
- The X-stock's adjustable length of pull means a single rifle can fit multiple shooters. At 116.8 oz, it is 22 oz lighter than the classic Big Boy, which matters when the gun is shared among shooters of different sizes.
- 7-round capacity is the lowest in the .357 Mag lever-action group. The Winchester 1873 and Rossi R92 both hold 10 rounds. That 3-round difference is meaningful for any defensive or hunting role where reloading from a tube magazine is slow.
- The synthetic pistol-grip stock and blued-steel receiver look nothing like a traditional lever action. Buyers who want the cowboy aesthetic should look at the standard Big Boy — the X is a different rifle for a different buyer.
- At 17.4 inches, the barrel produces less muzzle velocity than the 20-inch options in this group. The difference is roughly 100-150 fps on most .357 Mag loads, which matters if the rifle is intended for deer past 75 yards.
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Frequently Asked Questions
Should I get the Henry Big Boy or the Big Boy X in .357 Mag?
They are genuinely different rifles built for different buyers. The standard Big Boy has a brass receiver, octagon barrel, American walnut stock, 10-round capacity, and the classic lever-action look — it's the choice if heritage aesthetics or maximum tube capacity matters. The Big Boy X has a threaded barrel, M-LOK forend, synthetic adjustable stock, and 7-round capacity — it's for buyers who want suppressor compatibility, optic mounting without machining, or an adjustable fit. If you're unsure, ask yourself whether you'd actually use the threaded barrel or M-LOK rail within the next two years. If the answer is no, buy the standard Big Boy.
What suppressor thread pitch does the Henry Big Boy X use?
The Big Boy X barrel is threaded 5/8x24, which is the standard thread pattern for .30-caliber suppressors and widely used on pistol-caliber carbines chambered for .357 Mag. Most rimfire and pistol-caliber suppressors rated for .357 Mag use this thread or include an adapter. Confirm with your suppressor manufacturer before purchasing, as some models ship with a different thread adapter installed by default.
