Mossberg Model 340
O.F. Mossberg & Sons · Rifle · Discontinued · 1958
Also known as: Mossberg 340, Mossberg 340B, Mossberg 340K, Mossberg 340KA, Mossberg 340M
Overview
The Mossberg Model 340 is an American hammerless bolt-action repeating rifle chambered in .22 Long Rifle, produced by O.F. Mossberg & Sons from 1958 to 1971. Fed from a 7-round detachable box magazine, it was one of Mossberg's many affordable .22 sporting rifles, marketed to plinkers, small-game hunters and young shooters. Most versions carried a Monte Carlo stock with a cheekpiece, pistol grip and sling swivels, a 24-inch barrel, and a receiver grooved for scope mounting. The series spanned several closely related variants, including the target-styled 340B, the standard 340K, and the short-barrelled Mannlicher-stocked 340M carbine.
Specifications
| Weight (empty) | 2950 g (104.1 oz) |
| Overall Length | 1092 mm (42.99") |
| Barrel Length | 610 mm (24.02") |
| Action Type | Bolt Action |
| Firing Mechanism | Striker Fired |
| Trigger Type | Single Action |
| Magazine Capacity | 7 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 330 m/s (1083 fps) |
| Muzzle Energy | 141 J (104 ft·lbf) |
| Effective Range | 90 m (98 yd) |
| Barrel Rifling | Rifled |
| Rifling Twist | 406 mm (15.98") |
| Number of Grooves | 6 |
| Frame Material | Steel |
| Barrel Material | Steel |
| Stock Material | Wood |
| Finish | Blued |
Calibers
- .22 Long Rifle · primary — also known as .22 LR, 22 LR, 5.6x15mmR
Features
- Firing modes: Repeating
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety
- Features: Monte Carlo Stock, Cheekpiece, Pistol Grip, Sling Swivels, Detachable Box Magazine, Receiver Grooved For Scope, Bead Front Sight
Variants
- Mossberg 340B - Target Sporter
- Mossberg 340K - Standard Repeater
- Mossberg 340M - Mannlicher Carbine
Production
Production years: 1958-1971
Part of Mossberg's broad postwar family of budget .22 bolt-action sporters; the 340 shared its action with related 320, 342 and 346 models.
Origin
Country of origin: United States
Designer: O.F. Mossberg & Sons
Discontinued: 1971
Notes
Barrel length was 24 inches on the 340B and 340K but 18.25 inches on the Mannlicher-stocked 340M carbine (1970-1971). Chambers accept .22 Short, .22 Long and .22 Long Rifle interchangeably. Variants used suffixes such as 340B, 340B-A, 340K, 340K-A and 340M to denote sight and stock configuration changes over the production run.
Background
Inexpensive Mossberg .22 bolt guns like the 340 series were quintessential mid-century American 'boy's first rifle' and farm plinkers, sold in the hundreds of thousands through hardware stores and mail order at a fraction of the cost of premium sporters.