KMR Recoil Spring 4.5″ The KMR Recoil Spring for 4.5-inch compact-slide pistols is a precision-engineered component designed to optimize cycling performance, reliability, and frame longevity. Available in multiple tension ratings, allowing you to fine-tune your pistol’s recoil characteristics to match your ammunition and shooting style. Optimized for Compact-Slide Platforms Compact slides have different mass and travel characteristics than full-size models, making dedicated spring calibration essential. The right spring weight ensures smooth operation, consistent lock-up, and reduced wear on your competition or carry pistol. Available Variants: Hard (13 lbs): Maximum resistance — ideal for high-power ammunition and Major Power Factor loads Standard (12 lbs): Balanced performance for standard pressure ammunition Soft (11 lbs): Lighter resistance for reduced felt recoil and faster cycling Extra Soft (10 lbs): Minimum resistance for light loads and Minor Power Factor competition Extra Extra Soft (8 lbs): Ultra-light resistance for the softest possible cycling with light target loads Key Benefits: Frame Longevity: Properly matched spring tension prevents the slide from bottoming out against the frame 4.5″ Optimized Fitment: Tailored for KMR 4.5-inch models like the Umbra, Cuda, and Spectra Premium Spring Alloy: High-tensile steel maintains rating over thousands of cycles without sagging Competition Ready: Fine-tune your setup for IPSC/USPSA Standard, Open, or Production divisions
