Smith & Wesson Sear Spring TSW Series CS Compact Pistols Factory OEM 108320000

Smith & Wesson Sear Spring - Factory OEM Part

This is a genuine Smith & Wesson factory OEM sear spring for TSW series and CS compact semi-automatic pistols. Part number 108320000 is a critical fire control component that applies tension to the sear, ensuring proper sear engagement with the hammer and reliable trigger function.

Product Specifications

• Manufacturer: Smith & Wesson
• Part Number: 108320000
• Condition: Factory New
• Compatibility: TSW series and CS compact pistols (see full list below)
• Function: Sear spring
• Material: Spring steel
• Weight: 1 oz

Compatible Models

This sear spring is compatible with the following Smith & Wesson semi-automatic pistol models:

TSW Series (Tactical Smith & Wesson):

• Model 3953TSW - 9mm, compact, double-action-only
• Model 4003TSW, 4006TSW, 4013TSW, 4043TSW - .40 S&W variants
• Model 4513TSW, 4553TSW, 4563TSW, 4566TSW, 4583TSW, 4586TSW - .45 ACP variants
• Model 5903TSW, 5906TSW, 5943TSW - 9mm variants

CS Compact Series (Chief's Special):

• Model CS40C, CS40D, CS40S - .40 S&W compact pistols
• Model CS45C, CS45D, CS45S - .45 ACP compact pistols

Additional Compatible Models:

• Model 4003, 4006, 4563, 4566, 4583

About This Part

The sear spring is a vital component of the fire control system in Smith & Wesson semi-automatic pistols. This precision-manufactured spring applies constant upward pressure to the sear, keeping it engaged with the hammer notch until the trigger is pulled. When the trigger is pulled, the sear rotates downward against spring pressure, releasing the hammer to strike the firing pin.

The sear spring must provide precise tension - enough to keep the sear securely engaged with the hammer, but not so much that it creates excessive trigger pull weight. This delicate balance is critical for safe and reliable trigger operation. The spring also helps the sear return to its engaged position after each shot, resetting the trigger for the next pull.

A worn, weakened, or damaged sear spring can cause dangerous malfunctions including light trigger pull, sear slippage, hammer follow (hammer following the slide forward without trigger pull), or failure to reset. These issues can compromise both safety and reliability. Replacing it with a genuine Smith & Wesson factory part ensures proper sear tension and safe trigger operation.

Why Choose Factory OEM Parts?

When it comes to critical fire control components like the sear spring, using genuine Smith & Wesson factory parts ensures:

• Precise spring rate: Manufactured to exact Smith & Wesson specifications for proper sear tension
• Reliable operation: Correct spring force ensures safe sear engagement and trigger function
• Quality materials: Proper spring steel composition ensures durability and resistance to fatigue
• Perfect compatibility: Designed specifically for TSW and CS series pistols with guaranteed fitment
• Long-lasting performance: Factory springs are built to withstand thousands of trigger pulls
• Safety assurance: OEM parts meet Smith & Wesson's strict quality and safety standards

Installation Notes

Installation of the sear spring requires disassembly of the pistol frame and removal of the fire control components. This work should be performed by a qualified gunsmith if you are not experienced with Smith & Wesson semi-automatic pistol disassembly and reassembly. Proper installation, fitting, and function testing are critical for safe firearm operation.

Important: Always follow proper firearm safety procedures. Ensure your pistol is unloaded and pointed in a safe direction before performing any maintenance or parts replacement. After installation, verify proper sear engagement, trigger pull weight, and hammer function with snap caps before live fire.

About Smith & Wesson TSW and CS Series Pistols

The TSW (Tactical Smith & Wesson) series represents Smith & Wesson's enhanced 3rd Generation pistols designed for law enforcement and tactical applications, featuring improved sights, ergonomics, and reliability. The CS (Chief's Special) compact series offers full-power performance in a highly concealable package, perfect for concealed carry and backup duty. Both series are renowned for their quality construction and reliability. Maintaining these pistols with genuine factory parts ensures they continue to operate safely and reliably.

Note: This is a factory-new OEM part from Smith & Wesson. Always verify part compatibility with your specific pistol model before ordering.