Description
- Additional information
This is the Mossberg Sear, part no. 1300, for the Mossberg 350, 351, 353, 377 and 380 semi-automatic .22 rifles and the New Haven rifles built on the same action.
This is the later of Mossberg’s two autoloader sears. The earlier 151, 152, 352 and the original 350K use part R466; the 1300 takes over from the 350KA onward and carries through the 351, 353 and the later Plinkster models. The changeover falls in the middle of the 350 line, so a 350K and a 350KA take different sears despite being one letter apart.
Included: One of the sears pictured. Sold individually.
Fits:
- Mossberg 351C, 351CA, 351CB, 351K, 351KA, 351KB, 351KC
- Mossberg 350KA, 350KB, 350KC
- Mossberg 353
- Mossberg 377, 377S
- Mossberg 380
- New Haven 250C, 250CA, 250CB, 250CT
- New Haven 251C
- New Haven 453
Does not fit: The Mossberg 350K, 352, 352K, 151 or 152 series, or the New Haven 250K. Those take sear R466, listed separately.
Fitting: This is a fire control part and should be fitted by a gunsmith. Sear engagement is what holds the rifle at full cock, and on a semi-automatic a sear that is not correctly mated to the hammer can allow the hammer to follow the bolt down, fire more than one round on a single trigger pull, or fail to hold at cock at all. After installation, function check with dummy rounds or an empty chamber before loading: verify it cocks and holds, that the trigger releases cleanly and resets, that the safety holds in both positions, and that cycling the bolt by hand does not release the sear. Test-fire single rounds before loading a full magazine.
Please note: Buyer is responsible for verifying correct fit for their specific firearm. Installation should be performed by a qualified gunsmith. Please review all photos, as they are part of the description and show the actual item you will receive.
Condition: Used sears in a white steel finish, with light darkening on the raised edges and faint scattered staining across the flats. No rust or pitting. The pivot holes are open with no elongation, the sear noses are complete with no chipping or rounding, and all are straight and true with no bends.
Additional information
| Weight | 0.2 lbs |
|---|---|
| Dimensions | 7 × 5 × 0.5 in |
| Part |
Sear |
| Brand |
Mossberg |
| For Gun Make |
Mossberg |
| Model |
MOSSBERG Models 250 251 350 351 353 377 380 |
| Gauge/Caliber |
.22 Cal |
| For Gun Type |
Rifle |
| Country of Origin |
United States |
| Color |
White Steel |
| Material |
Steel |
| MPN |
1300 Sear |
