Cooper Arms Model 21 Varminter .223 Rem Single Shot Bolt Action Rifle

SOLD FOR: $1,609.00

LSB#: LSB260429JR007

Make: Cooper Arms of Montana

Model:  21

Serial Number: 3521

Year of Manufacture: Circa 1990s-2000s

Caliber: .223 Rem

Action Type: Bolt action, single shot, centerfire rifle

Barrel Length: 24″

Sights / Optics: There is no provision for iron sights. The top of the receiver is drilled and tapped for a scope base. There is a set of Leupold rings and bases installed, 30 mm rings with inserts. 

Stock Configuration & Condition: The stock is one piece checkered walnut, beavertail forend, capped semi pistol grip, straight comb, and rubber buttpad. The LOP is 13 3/4″ from trigger to buttplate. There are light scratches and compression dents throughout. There are no chips or cracks. Overall this stock is in Very Good to Excellent condition. 

Type of Finish: Blued, Stainless 

Finish Originality: Original 

Bore Condition: The bore is bright. The rifling is sharp. There is no erosion. There is light fouling. In this writer’s opinion this bore rates 9.75/10.

Overall Condition: This rifle retains about 97% of its original finish. There are light scratches and handling marks. The screw heads are sharp. The markings are clear. Overall this rifle is in Very Good to Excellent condition. 

Mechanics: The action functions correctly. We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.

Box, Paperwork & Accessories: scope rings 

Our Assessment: This Cooper Arms Model 21 Varminter in .223 Remington is a quality single-shot bolt-action rifle configured for precision varmint and target use. Dating from the 1990s–2000s, it features a 24″ barrel, no iron sight provision, and a drilled-and-tapped receiver fitted with Leupold bases and 30mm rings with inserts. The single-shot action, varmint-style configuration, and widely available .223 Remington chambering make it a practical and appealing rifle for bench shooting, varmint work, and careful load development.

The bore is a major strength, described as bright with sharp rifling, no erosion, and only light fouling, rating 9.75/10 in the writer’s opinion. Mechanically, the action functions correctly, though the rifle has not been test fired. The rifle retains about 97% of its original blued and stainless finish, with only light scratches and handling marks. The screw heads are sharp, the markings are clear, and the metal condition supports its Very Good to Excellent overall rating.

The checkered walnut stock is also in strong condition, showing light scratches and compression dents throughout but no chips or cracks. Its beavertail forend, capped semi-pistol grip, straight comb, and rubber buttpad are well suited to a varmint rifle, offering stability and shooter comfort from supported positions. While it does not include a box, the installed Leupold rings and bases add useful value. Overall, this is a clean, original Cooper Model 21 Varminter with an excellent bore, strong mechanics, and only minor cosmetic wear, making it a desirable precision-oriented single-shot rifle. Please see our photos and good luck on your bids! MF