The EMod replaces the original insert for ModWing holster concealment wings to optimize it for use with the Enigma system. The angled inserts allow the Enigma faceplate to fit smoother and slimmer, without compromising concealment, and better direct the faceplate pressure to improve pistol grip tuck and rotation.
The short EMod is approximately 1/16th of an inch taller than a small Modwing insert, and the tall EMod insert is approximately 1/8th of an inch taller than the large Modwing insert.
(The EMod is for use with non-light bearing holsters and non-light-bearing Enigmas. On light bearing applications, the Enigma faceplate is already parallel to the face of the standard wing and the EMod will not change any interaction between the parts in a meaningful or useful way.)