I have 3 or 4 different brands but not a Vang Comp, they all work pretty much the same, the esstac has a nice big loop for removal and is my favorite. The only real differences are round count and color. The M4 receiver will accommodate a 7 round size, others, such as Mossberg, will only hold a 5 comfortably and a 7 round fits perfectly in a 30 round AR pouch for rapid spares.