This 3D printed Steel Magwell is designed for the Sig P226 Legion SAO, Elite SAO & new DA/SA updated frame models. It does fit in the IDPA box if you want to use it in ESP division. This Magwell requires Stock Legion SAO grips or modified DA/SA grips for installation ,it also requires matching baseplates. This magwell requires Mecgar Magazines! DOES not fit E2 grips!