Cargo pants are good for a lot of things. Holding shotgun shells isn’t one of those things.
If you are in a life and death (or a “I need to shoot this animal to eat”) situation – you need to be able to reload fast. This forearm shell sleeve holds 8 shotgun shells in a ready position for quick reloading. It’s designed to fit most any sized arm securely. Each sleeve is effective on either arm, so you can use on your front hand for more speed, or on your trigger hand (since the tactically correct thing to do would be to never remove your rear hand from the weapon).