The extension pack for the Patrol Rifle Integrated Magazine Pouch (I.M.P.) is an upgradable option for customers who find that their duty belt is too thick to use with their I.M.P... Most duty belts will not need this option, but due to the variations of thickness by the gun belt manufactures, and because sometimes the user’s gun belt overlaps itself, in essence doubling its width, we offer this option in case you need it. The extension pack allows the user to extend the I.M.P.’s belt plate outward from the rear of the I.M.P. one quarter inch (1/4") to accommodate thicker / double layered duty belts.