Check the listing for details. Wilson Combat - 1911 Complete Spring Kit - Commander - 316C. Condition: New. Listed at 18.95 USD. Wilson Combat - Complete Spring Kit Model: 316C Fits: Commander 1911 Brand new & factory sealed Product Description: This top quality complete spring set for a “Commander” style 4.25” 1911 contains every spring needed to complete or upgrade your pistol. These heat treated music wire springs are the finest quality coil springs on the market and will provide you with exceptional service. Extra Power recoil springs are rated for standard velocity and high-velocity loads and a reduced power hammer spring improves your trigger pull and reduce the force required to cycle the slide. Note: The recoil spring in this set is only appropriate for “Commander” slide 1911 pistols with 4.25” barrels. This recoil spring is not appropriate for a Wilson or Kimber “Compact” pistols with 4” barrel length. This spring kit contains the following springs: P10C20 - Spring, Recoil, Comm, 20# P26 – Extra Power Firing Pin Spring P27 – Reduced Power Hammer Spring 18# R15A – Mag Catch Spring R29 – Spring