Check the Blue Book of Gun Values
47-58
This semi-auto rifle was made between 1946-1951.
The Mossberg Model 151-K was made for two years only: 1950 and 1951.
No published sn data.I can say that the Mossberg model 151 semi-auto .22cal rifle was made from 1950-1951 if it is the model 151K.The model 151M was made from 1946-1947.The model 151M(a),151m(b),and 151(c) were made from 1947-1958 and were close to the model 151M with minor changes in the buttplate,and sights.
Depending on condition, between $100 and $200.
The Mossberg 151 M-B, a semi-automatic .22 caliber rifle, was produced from 1951 to 1960. It was designed as a versatile and affordable option for small game hunting and target shooting. The rifle featured a unique design and was popular among enthusiasts during its production run.
There is a 151M, with a long 2 piece stock, made from 1946-1958, and a 151K, one piece stock with a rounded forearm (called a schnabel) made 1950-51. Do not have a listing for a 151 with no letter. Depending on condition, value is between $100-$225. They are great shooting rifles, and there IS collector interest in those models. Many are missing the rear peep sight, which is expensive to replace. Run a Google search for "epix mossberg models" for some good info and photos of the various Mossberg 22s.
IF the rifle has all sights, etc, has not had stock modified, there IS a modest collector's interest in the older Mossberg 22s. $200-$250 is an average price. They shoot VERY well.
There are 2 different Mossberg 151's- the 151M (wood goes all the way to the muzzle) and the 151K (wood does not go all the way to the muzzle, but stops with a rounded bump- called a Schnabel) There is collector interest in both, the 151M is usually worth a few dollars more. Value will depend on condition and completeness (rear sights and Mossberg sling swivels are pricey to replace if missing) Value may range from $125 to $250 for a minty specimen.
model 151 k with scope
Since these rifles were made prior to the 1968 Gun Control Act, they do not have serial numbers, so cannot be dated to a single year. However, the Mossberg 151K was only made for 2 years- 1950 and 1951. It will be one or the other.
Value is driven by make, model, condition and originality. With the 151 M, often the rear peep sight or sling swivels may be missing. If complete, values may run from $100 to $200 for an excellent specimen. There IS some small collector interest in older Mossberg 22s.