WINCHESTER SEAR SPRING SXP

The Winchester SXP sear spring is a factory original spare part for the trigger mechanism of the 12 gauge Winchester SXP pump-action shotgun. The steel spring maintains the necessary tension for the sear and is designed to replace a worn, damaged, or lost original part.

Suitable for use with

• Winchester SXP 12 gauge pump-action shotgun

• Replacing a worn sear spring

• Replacing a damaged or broken original spring

• Trigger mechanism repair

• Restoring the firearm to factory configuration

• Maintenance performed by a gunsmith

• As a spare part for firearm repair and maintenance workshops

• For users who need a spare part that matches product code U1280045AE exactly

Why choose the Winchester SXP sear spring?

• Winchester OEM factory spare part

• Designed specifically for the Winchester SXP model

• Fits 12 gauge version

• Exact product code U1280045AE

• Made of steel

• Meets the purpose of the original part

• Maintains and releases the tension required for the sear to function

• Suitable for replacing a worn or damaged factory part

• Not an aftermarket reduced trigger spring

• Compact, model-specific repair part

Technical specifications

• Manufacturer: Winchester

• Product type: firearm spare part

• Part name: sear spring

• English name: sear spring

• Installation location: trigger mechanism

• Compatible firearm type: pump-action shotgun

• Compatible model: Winchester SXP

• Caliber: 12

• Material: steel

• Finish: unfinished

• Origin: OEM factory spare part

• Purpose: replacement of the original spring

• In the package: 1 sear spring

• Installation: recommended by a qualified gunsmith

Included

• Winchester SXP 12 ga sear spring U1280045AE

Other trigger mechanism parts, fasteners, and tools are not included. Before ordering, check the exact model, caliber, and product code of the existing part.

Frequently Asked Questions

Which firearm is the U1280045AE sear spring suitable for?

The spring is designed for the Winchester SXP 12 gauge pump-action shotgun. Compatibility should not be determined by shape alone—please check the firearm model and spare part code.

Does this spring fit the Winchester SXP 20 gauge model?

Product code U1280045AE is specified for the 12 gauge SXP sear spring. For the 20 gauge model, choose the spare part approved for that configuration.

Is this a genuine Winchester original spare part?

Yes. This is a Winchester OEM factory spare part intended to replace the original sear spring.

What is the function of the sear spring?

The spring maintains the necessary tension for the sear and supports its intended movement during the operation of the trigger mechanism. The condition of this part is important for the proper functioning of the mechanism.

Does the spring make the trigger lighter?

This is a replacement for the factory original part, not a competition spring to lighten the trigger pull. Its purpose is to restore the mechanism's intended operation, not to alter trigger characteristics.

How can I determine if the sear spring needs replacement?

A malfunction in the trigger mechanism may be caused by the spring, but also by other worn, damaged, or incorrectly installed parts. Have a gunsmith inspect the firearm before ordering a spare part.

Can I install the sear spring myself?

The trigger mechanism is a critical safety component of the firearm. The manufacturer recommends having Winchester spare parts installed by a qualified gunsmith.

Recommended products and services

• Firearm accessories and spare parts

• Firearm cleaning products

• Maintenance benches and mats

• Smoothbore firearms

When is the Winchester SXP sear spring the right choice?

U1280045AE is the right choice when the Winchester SXP 12 gauge pump-action shotgun's spare part diagram, existing part, or gunsmith's assessment confirms the suitability of this product code. The OEM spring is intended to replace the factory original part and maintain the firearm’s original configuration.

This part is not suitable for the 20 gauge SXP or other Winchester models based on external similarity alone. If you wish to change the trigger pull weight or other operational characteristics, do not use a randomly selected spring—such modifications must be assessed by a competent gunsmith.

We recommend

Before ordering a spare part, check the exact model, caliber, and, if possible, the part code on the spare parts diagram. Winchester SXP parts for different calibers and production versions may not be interchangeable, even if they look similar.

If the trigger mechanism malfunctions, we do not recommend replacing the spring based solely on assumptions. The cause could be dirt, wear, a damaged sear, incorrect spring position, or another mechanism part. Always keep the firearm unloaded and remove ammunition from the work area before inspection.

Have the sear spring installed by a qualified gunsmith. After repair, check the proper functioning of the trigger, safety, and entire locking mechanism before putting the firearm into use.

Winchester original spring for SXP trigger mechanism

Winchester U1280045AE is an exact-fit steel OEM sear spring for the SXP 12 gauge pump-action shotgun. It is a practical replacement part for restoring the firearm's factory configuration when compatibility is confirmed by the part code and installation is performed by a qualified gunsmith.

We recommend using the services of a gunsmith to replace spare parts.