O.F. · Rifle

Mossberg Model 640 Chuckster

Name: Mossberg Model 640 Chuckster
Brand: O.F.

Bolt action · .22 Winchester Magnum Rimfire · introduced 1959

Also known as Mossberg 640K, Mossberg Chuckster, Model 640KD Chuckster

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About the Mossberg Model 640 Chuckster

The Mossberg Model 640 Chuckster is an American bolt-action sporting rifle chambered in .22 Winchester Magnum Rimfire, produced by O.F. Mossberg & Sons from 1959 to 1984. Marketed for varmint and small-game hunting, the Chuckster earned a reputation for accuracy with its 24-inch barrel, Monte Carlo walnut stock with pistol grip and raised cheek piece, adjustable open sights, and a 5-round detachable box magazine. It was one of the earliest rifles offered in the then-new .22 WMR cartridge.

Named the 'Chuckster' for its role as a woodchuck and varmint rifle, the Model 640 became one of the classic American rimfire magnum sporters of the mid-20th century.

Mossberg Model 640 Chuckster specifications

General

Type: Rifle
Action: Bolt action
Firing mechanism: Striker-fired
Trigger: Single action
Calibres: .22 Winchester Magnum Rimfire
Magazine capacity: 5 rounds
Magazine: Detachable box magazine

Dimensions

Barrel length: 610 mm (24.0 in)
Overall length: 1137 mm (44.8 in)
Weight (empty): 2.72 kg (6.00 lb)

Barrel

Rifling: Right hand

Materials

Barrel: Steel
Receiver / frame: Steel
Stock: Walnut
Finish: blued

Performance

Muzzle velocity (typical): 575 m/s (1886 fps)
Muzzle energy (typical): 428 J (316 ft·lb)
Effective range: 125 m

History

Introduced: 1959
Discontinued: 1984
Production status: Discontinued
Country of origin: US

Features

Monte carlo stock
Pistol grip
Raised cheek piece
Sling swivels
Adjustable open rear sight
Dovetailed front sight
Detachable magazine

Safety

Manual safety

The Chuckster line was offered in several sub-variants (640K, 640KA, 640KD, 640KS) differing in finish, checkering and trim; the deluxe 640KS added a gold-plated trigger.