Quick loader?
 

I found this loader in my father-in-laws stuff ,man I can fill a 30 rder in about 5 sec! Is it military issue or over the counter I have never seen one. The ammo does have to be on these clips

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Yes. There is one of the loaders in each bandoleer( belt with pockets to hold ammo) that is packed in ammo cans. The clips are Called stripper clips. The military ammo always comes on a clip or a belt.

The rounds are on a stripper clip, and the go into a "spoon" which attaches onto the spline of the magazine. They've been around for a while and are super handy. I have about 500 of them, but only bother to load them before a carbine class or an all day shoot. Check out the maglula, its a nifty lil gadet that can accept a stripper clip of loose rounds I find them indispensible. Btw it usually takes me about an hour to load up 1000 rounds on to strippers, taking my time with a friend nursing a bill. I really find them almost a must have for a class as I'm usually dying to get back on the firing line and hate wasting time loading up.