You can run, jump, go prone pouch will retain mag with no problem. Yet, they are easy to draw for a quick reload.

Sub Gun Mag Open Molle Single Pouch
Sub Gun Mag Open Molle Single Pouch
Item# 193459386
$21.95
Colors:  MagSelection: 

Product Description

Sub Gun Mag Open Molle Single Pouch
Made to hold a 32 Rounds Colt Sub Gun Mag, will also hold a Glock 33 Rounds mag. Pouch is made tight tolerance, stiffness, and a pressure foam to secure mag. You can hold pouch upside-down with a fully loaded mag and it will be retained by the pouch. (You will have to shake pouch upside-down hard for mag to pop out). Yet they still draw out easy for a quick reload.