Mossberg Model 151K .22 LR Semi-Automatic Rifle – 1950s Buttstock-Fed 15-Shot Tubular Magazine
The Model 151K stands out for its unique buttstock-housed tubular magazine, letting shooters load fifteen rounds of .22 Short, Long, or Long Rifle directly through a side port in the stock. Produced in the early 1950s before serial numbers were required, this K-variant adds a Monte-Carlo walnut stock and two-piece rear knob cocking assembly similar to USMC training rifles. Collectors appreciate its short production run, practical design, and classic mid-century Mossberg craftsmanship.
Condition
Overall Condition: Fair – Extensive signs of prior use and handling.
Bore Condition: Fair – Generally clean with some residue or smudges and slight corrosion.
Bore Rifling: Fair – Worn rifling with slight loss of definition.
Specific Condition Notes: The metal shows heavy pitting and overall wear. The butt plate is chipped. All mechanical functions appear intact.
What’s Included
- Mossberg Model 151K .22 LR semi-automatic rifle
Introduced around 1950, the 151K reflects Mossberg’s push to offer a full-stocked sporter that could shoot a variety of .22 rimfire loads without modification. The blowback action reliably cycles .22 Short, Long, and Long Rifle, giving the shooter flexibility at the range or in the field.
The 15-round tubular magazine runs through the buttstock, leaving the fore-end slim and balanced. A spring-loaded loading port on the right side of the stock makes reloading straightforward while keeping the profile clean.
The walnut stock features a Monte-Carlo cheekpiece and a full-length fore-end that protects the barrel while providing a comfortable, traditional grip. Period advertising highlighted this upgraded stock on the K-variant as a step up from earlier models.
Sights consist of a fixed front blade on an integral ramp and a barrel-mounted folding rear leaf with a stepped elevator, giving the shooter simple, rugged sighting options typical of the era.