Henry Big Boy X Model .357 Mag Lever-Action Rifle with Custom Muzzle Brake & Picatinny Rail
The Henry Big Boy X Model blends classic lever-action handling with modern, shooter-focused features. Chambered for .357 Mag (and .38 Special), this full-size rifle adds a threaded barrel, synthetic furniture, and factory side-loading gate to the proven Big Boy platform. An aftermarket multi-port muzzle brake and a 4-slot Picatinny rail on the fore-end further expand its capability, giving buyers a ready-to-run, versatile package.
Condition
Overall Condition: Good – Shows signs of prior use and handling.
Bore Condition: Good – Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling – Intact, well-defined lands and grooves.
This rifle displays scattered scratches, blemishes, and areas of surface rust and pitting, but remains in solid functional shape.
What’s Included
- Black web two-point sling (installed)
The 17.4-inch carbon-steel barrel is factory threaded 5/8-24 and now sports a multi-port brake that tames muzzle rise without adding excessive length.
A synthetic fore-end with M-Lok slots carries a 4-slot Picatinny rail, giving quick attachment points for lights, lasers, or bipods while maintaining a slim profile.
Henry’s side-loading gate and removable magazine tube simplify reloads and unloads. The tubular magazine holds seven rounds, and the action reliably cycles both .357 Mag and .38 Special for cost-effective practice.
The large loop lever is wrapped in green paracord for improved purchase and glove-friendly manipulation. A rubber recoil pad, integral swivel studs, and textured grip panels round out the black synthetic stock.
Fiber-optic sights—green up front, fully adjustable at the rear—provide a bright, intuitive sight picture. A hammer-mounted transfer-bar safety adds an extra layer of security without affecting the crisp lever-action feel.




