i love how these can be stacked because of the molle webbing on the front. you can also fit a frag pouch, flashbang pouch, pistol mag pouch, radio pouch or almost any pouch with only one or two webs across and one two or three webs tall but if you put more than one next to each other you can put almost anything on them and they are open top which means fast and easy access which is good during airsoft, paintball or real life combat plus they are a very good price too.