Check the listing for details. Wilson Combat Custom-Tune Spring Kit S&W J-Frame NEW! # 321. Condition: New. Listed at 17.24 USD. Spring Kit, Custom-Tune, S&W J Frame, Revolver 321 NEW! Caliber: Universal For the Following Handgun Type: Revolver Transform your shooting experience with the Wilson Combat custom-tune spring kit for the S&W J frame revolver! This revolutionary package provides you with everything necessary to upgrade your Smith & Wesson revolver offering an 8# reduced power hammer spring, and 3 additional reduced power rebound trigger springs. With this premium upgrade, you'll experience a lighter trigger pull . Make your shooting experience smoother and more precise with the Wilson Combat custom-tune spring kit! Get it today and revolutionize your J frame revolver. Kit Contains: 8# reduced power hammer spring 13#, 14#, 15# reduced power rebound trigger spring NOTE: Not for use in rimfire models. 5 STAR REVIEWS: "Great product, easy enough to install. Works great. Vastly improved my accuracy." "Bought this spring kit for my wife's brand new 642. Super easy to replace the springs, and the trigger is smooth as butter now! Well worth the $!!!" "Very affordable, efficient delivery, perfect performance." ~~~~~~~~~~~~~~~~~~~ ALL MANUFACTURERS WARRANTIES WILL APPLY ! All of our products are BRAND NEW in the box; and contain all of the parts, materials and documentation. You can expect and will receive prompt delivery of your item. We will ship your order within ONE DAY! We are unable to accept returns on used, fitted, or altered parts. Returns must be in new, unused condition and in their original packaging.