Cooper Model 21 .17 Mach IV Single-Shot Bolt-Action Rifle, 23.75 in Barrel, Walnut Stock, Recessed Crown
Factory-chambered in the uncommon .17 Mach IV, this Cooper Model 21 is a purpose-built, single-shot bolt-action with a solid-bottom receiver and a top-loading/ejection port. It features a 23.75-inch medium sporter/varmint barrel with a recessed crown, a checkered walnut stock, and a matte blued/black finish. The receiver is drilled and tapped, and a scope mount is installed.
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: This rifle appears very well maintained.
What's Included
- Cooper Firearms Model 21 single-shot bolt-action rifle chambered in .17 Mach IV
- Scope mount installed
The Model 21 action is configured as a single-shot with a solid-bottom receiver, offering a 1-round capacity and a clean top-loading/ejection port. The bolt body has a bright finish with a round knob, complementing the rifle’s controlled, precise handling characteristics.
The 23.75-inch barrel uses a medium sporter/varmint contour and ends in a recessed crown to help protect the muzzle. The rifle wears a matte blued/black metal finish, and it is built in the United States.
The receiver is drilled and tapped for optics, and a scope mount is already installed. There are no iron sights fitted, giving a clean sighting plane for glass.
The walnut stock features sharp checkering, a checkered pistol grip, sling swivel studs, and a rubber recoil pad. Length of pull measures 14.0 inches, providing a comfortable, steady interface with the shooter.




