This spring is designed to fit the MR918, MR920, and our Gen1-3 and Gen4-5 stainless steel guide rods.
Shadow Springs are formed from high-quality chrome silicon material. There is some debate on this point, but we do feel that chrome silicon springs are simply a higher quality, longer wearing spring, ESPECIALLY in high heat from extended firing. We typically recommend changing springs at around 5,000 rounds, but we have run these springs for as many as 10,000 rounds.
Chrome silicon recoil spring
Fits Shadow Systems stainless steel rods
Premium chrome silicon spring in your choice of standard factory weight 18 lbs.(similar to G19 weight), lightweight 15 lbs., or heavy 20 lbs.
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Restrictions: By buying this item from Shadow Systems, the Customer certifies that the Customer will comply with any and all requirements imposed by applicable U.S. federal, state, and local laws, regulations, and administrative policies.