The Apex Tactical SD Spring Kit (brand part no. 107-120) is a drop-in spring set that reworks the trigger feel on Smith & Wesson SD and SDVE pistols chambered in .40 S&W. The kit produces a smoother trigger pull and improves reset over the factory springs, changes Apex designed specifically for duty and carry use where a cleaner trigger matters. It works as a stand-alone upgrade or alongside the Apex SD Polymer Action Enhancement Trigger for an even more refined pull. The kit includes a trigger spring, a striker block spring, and an SD striker spring, covering the three springs that most influence trigger feel and reset.

Key Specifications

• Smoother Trigger Pull comes from Apex’s reworked spring rates versus factory springs.
• Improved Trigger Reset shortens and cleans up the reset compared to stock.
• Trigger Spring Included is one of three springs in the kit.
• Striker Block Spring Included is tuned to work with the lighter trigger pull.
• SD Striker Spring Included completes the three-spring kit.
• S&W SD/SDVE .40 S&W Fit is sized specifically for this pistol and chambering.
• Duty/Carry Focused Tuning is designed for reliable defensive use, not just competition.
• Stand-Alone or Combo Use works alone or alongside the Apex SD Polymer Action Enhancement Trigger.

Frequently Asked Questions

What pistols does this kit fit? The Smith & Wesson SD and SDVE in .40 S&W.

What springs are included? A trigger spring, a striker block spring, and an SD striker spring.

Can this be used without the Apex trigger? Yes, it works as a stand-alone upgrade or alongside the Apex SD trigger.

Buy the Apex Tactical Spring Kit

Smooth out your SD or SDVE’s trigger with an Apex Tactical spring kit from our gun parts and accessories selection. Order online and we will ship it straight to your door from our Lubbock, Texas gun shop.