In House Shipping:
Make: Remington
Model: 510
Serial Number: 61688
Year of Manufacture: 1940 (KJ Date Code)
Caliber: .22 cal Shot Cartridge
Action Type: Bolt Action, Single-Shot
Barrel Length: 24.5”
Sights / Optics: The front sight is a bead at the muzzle.
Stock Configuration & Condition: The stock is one piece hardwood with semi-pistol grip, straight comb, and Remington checkered hard rubber buttplate. The LOP measures 13 5/8 from the front of the trigger to the back of the buttplate. There scattered light handling marks, nicks, and compressions. There are no chips or cracks. The stock rates in about Fine overall condition.
Type of Finish: Blued, Case Color Bolt
Finish Originality: Original
Bore Condition: The bore is bright. There is no erosion in the bore. In this writer’s opinion the bore rates 10/10
Overall Condition: This rifle retains about 95% of its metal finish. The balance of the finish is strong throughout with intermittent oxidation and thinning at the leading edges. The case color is still vibrant on the bolt. There is some minor patina on the bolt handle. The screw heads are sharp to tool marked and pins are unmarred. The markings are clear. Overall, this rifle rates in about Fine 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: None.
Our Assessment: This 1940 Remington Model 510 Targetmaster is a unique and desirable variation chambered for the .22 caliber shot cartridge—a Mo-Skeet-O bore configuration rarely encountered today. Originally intended for close-range pest control, indoor training, or skeet-style small game shooting, the Mo-Skeet-O guns were often sold in sets for mechanical trap shooting games and are now sought after for their novelty and rarity.
Mechanically simple and robust, the Model 510 is a single-shot bolt-action rifle with a reputation for precision and durability. This example still has a vibrant case-colored bolt and retains about 95% of its original metal finish, with only light oxidation and minor handling wear. The bore is bright and clean with strong rifling—especially notable given the intended use with soft shot loads. The hardwood stock has only minor cosmetic blemishes, and there are no cracks or chips.
For collectors of Remington rimfires, vintage varmint guns, or oddball shot-capable rifles, this is a standout piece. The Mo-Skeet-O chambering sets it apart from standard Targetmasters and offers a conversation-starting addition to any .22 rifle collection. Whether you're preserving an unusual piece of shooting history or simply appreciate the charm of single-shot simplicity, this 510 is a fine, functional, and rare specimen.