This spring is for use with stock XD Tactical Guide Rods or PistolGear's Guide Rod with part number PG036. If you are using this spring with the XD(M) 4.5 model, you must use PistolGear's "Skinny" Guide Rod with part numer PG066.
Note: The spring packaging may state "1911" but we assure you that they are compatible with the Guide Rods noted. This spring is NOT for the XD Tactical in 45ACP.
Made by W.C. Wolff Company