Check the listing for details. S&W SD VE Trigger Spring Upgrade Kit for Smith & Wesson SD9 SD40 SD9VE SD40VE. Condition: New. Listed at 18.00 USD. Smith & Wesson SD Series Spring Kit (SD9, SD40, SD9VE & SD40VE)This SD Spring Kit produces a smoother trigger pull and improved reset, along with lowering the trigger pull weight from 8lbs factory to a comfortable useable 4.5 - 5.5 lbs range with a reliable ignition of standard primers. Designed for Duty/Carry use. The kit is the perfect complement to any Smith & Wesson SD pistol. The kit works as a stand-alone or in conjunction with an SD Polymer Action Enhancement Trigger Reduces trigger pull weight to approximately 4.5 - 5.5 lbs from the factorySmooths trigger pull Improves reset COMPATIBLE WITH: Smith & Wesson SD & SD-VE Series semi-auto pistols (SD9, SD40, SD9VE & SD40VE). NOT COMPATIBLE WITH: Smith & Wesson SW9VE or SW40VE, this kit will not work in those guns NOT for use in the Sigma Series pistols This kit DOES NOT include a sear spring. This kit is designed to work with the factory sear spring, so removal and/or replacement of the sear spring is not necessary. Includes 1 Trigger Return Spring 1 Striker Block Spring 1 SD Striker Spring PLEASE READShipping AlertCurrently The United State Postal Service are experiencing delays with some mail deliveries, due to the current environmental situation, office closures, volume of mail and lack of transportation. Mainly associated with but not limited to First ClassThey have indicated to us that in some cases it's taking a minimum of 10 business daysPlease note if your package is delayed, which can be seen from the tracking number we provide, please be patient as it's not our fault.Also we advise you to use the tracking system on the USPS website as it's more accurate and up to date.NOTE The average results of trigger pull measurements may differ by as much as +/- 1lb. There are many factors that can cause variations in trigger pull values, including differences in manufacturing processes, the age and wear of the firearm, and the method used to measure the trigger pull weight. No two firearms are exactly the same, and even firearms produced in the same year can have subtle variations. Additionally, the wear and usage of a firearm can affect the trigger pull, as the hammer and sear may become smoother and the spring may feel less stiff over time. It is important to use a reliable and accurate method, such as the Wheeler Professional Digital Trigger Pull Gauge, to measure trigger pull weights, and to take an average of multiple measurements to account for human error.