Henry Big Boy Steel Side Gate .357 Mag Lever-Action Rifle, 20 Inch Blued Steel, 10-Round, H012GM (USA)
This Henry Big Boy Steel Side Gate in .357 Mag stands out for its dual-loading system, robust blued steel construction, and rifle-length 20 inch round barrel. It is the H012GM model, built in the USA, with classic iron sights and a 10-round tubular magazine. The wood stock features a straight grip, checkering, and a recoil pad, with a 14 inch length of pull.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Shows minimal markings from previous handling and use. See the photos for close-ups of the exterior surfaces.
What’s Included
- Henry Big Boy Steel Side Gate .357 Mag rifle (Model H012GM)
The Big Boy Steel Side Gate series combines traditional lever-action operation with a modern dual-loading system. You can top off through the side gate or unload via the removable inner magazine tube. This rifle-length configuration uses a 20 inch round barrel and a 10-round tubular magazine in .357 Magnum.
Construction is all-steel with a blued finish on both the receiver and barrel for a cohesive, classic look. The round steel barrel aligns with the rifle’s practical handling while maintaining durability and consistency.
Factory iron sights include an adjustable semi-buckhorn rear and a ramped brass bead front, offering a straightforward sight picture well suited to this platform. These sights are set up for quick acquisition and easy adjustment.
The wood stock has a straight grip with checkering and a recoil pad, providing a solid, comfortable interface. Length of pull is 14 inches, and sling swivel studs are installed front and rear. This H012GM-marked model is made in the USA.




