those 4 pockets on the both sides are pretty free variable. you could put lots of things in it. two near the center are not really designed for grenades. but you could. since that type..77? palm seize grenades didn't come in service a lot, and the standard grenades are type 69 and some other kind of stick grenades, there is a grenade pounch where you wear on the side of gas mask bag, on your right hand side. so those two pockets mostly are filled with first aid kit, it's a pack, with the seize of that pocket. and the rest two pockets on the far end, could be fitting with...whistle for officer, or pens, papers, since it has rubber inside which is water resistent. i think you could also put rifle cleaning kits in it too, but i haven't seen many does that. ever since the rifle cleaning kit for type 81 is inside the stock.