The highest quality recoil springs from ISMI offered in 14lbs, 16lbs, 18lbs, 20lbs, and 22lbs. Will work with our Springfield XDM guide rods to tune your recoil system to the load and the feel you prefer.  These work with the factory style guide rod in the Springfield XDM 4.5 and 5.25 models only. If you have a Elite 4.5 or 5.25 you will need our solid SS XDM guide rod.(XDM Stainless Guide Rods-Factory Replacement )