Enhance your firearm's performance with the Strike Industries SI-AR-LRSK M4 223/5.56 Rifle Lower Receiver Spring Kit, precision-engineered for reliability. This kit includes all essential components needed for a seamless upgrade to your 223/5.56 lower receiver, catering to both professionals and enthusiasts. Includes all essential lower receiver springs Manufactured from high-quality, durable materials Improves trigger responsiveness and overall operation Easy installation, no advanced gunsmithing required Designed for consistent tension and smooth performance Transform your shooting experience with the Strike Industries SI-AR-LRSK Spring Kit today.