TANDEMKROSS Red Spring Recoil Spring Ruger PC Carbine Red. 20percent stronger than the OEM recoil spring this precision-ground flat spring ends to minimize spring buckling and ensure even transfer of recoil forces - translating into consistent and clean cycling with a variety of ammunition velocity. The dark red color of the recoil spring is a simple way to show your #TANDEMIZED pride and keep your upgraded springs separate from factory springs Improve the performance and reliability of your Ruger PC Carbine with the new Red Spring Recoil Spring for Ruger PC Carbine Please Note The Red Spring Recoil Spring for Ruger PC Carbine is designed for use with 9mm only. It will not be compatible with .40SW Compatible with both the Ruger PC Carbineand Ruger PC Charger Specifications for TANDEMKROSS Red Spring Recoil Spring: Manufacturer: TANDEMKROSS Gun Model: Ruger PC Carbine Fabric/Material: Steel Color: Red Features of TANDEMKROSS Red Spring Recoil Spring Optimized stress design for maximum spring life Rocket Wire material for long lasting - superior performance Colored Red for a unique identifier between factory and TK springs Package Contents: TANDEMKROSS Red Spring Recoil Spring What firearm models does the manufacturer say TANDEMKROSS Red Spring Recoil Spring is compatible with? The manufacturer suggests that TANDEMKROSS Red Spring Recoil Spring is compatible with Ruger PC CarbineTANDEMKROSS TK28N0404RED1: Red Spring Recoil Spring Ruger PC Carbine Red