I see it referenced in many threads and my search turned up negative.  Can someone explain it to me?

Put the weapon at your hip, put your thumb through the trigger guard.  Pull the weapon forward, this will fire the weapon, the recoil will push it back, and as long as you have forward pressure it will continue to fire.

It's actualy pretty retarded.

www.powercustom.com/AKPages/videos/bumptime.jpg








With some practice you can do the same from your shoulder.  

It's not always from the hip, I can do it with an AR from the shoulder.

What you do, is keep your index finger on the trigger. Holding the front grip with your other hand, pull the gun forward from the forgrip, discharging the gun. The recoil will push the gun backwards. But if you keep the foreward pulling pressure, it will find the fulcrum of the two sides, and fire rapidly, up to as fast, and sometimes faster than a registered machine gun.

Search google, there are websites with videos on how to do it.

Try it, its fun and attracts attention, sometimes good, sometimes bad. But its perfectly legal, its just a rapid pulling of the trigger.

Gets expensive though.

I remember the first time I bumped off my AK. It was my very first AK, a AMD63; full stock, 16 inch barrel, very accurate. I held both grips at about chest height. I was at a private range, where it was just a dirt berm to shoot into. Held the front grip and pulled it forward, let out a burst of about 4 rounds without even trying. I was hooked. When I drove back to the building to pay for range time, they asked what I had, I simply said an "AK" One of the farm hands said it was loud and  "pop pop pop pop" and grinned. Good times.

Thanks for the replies.  I will try it when and if the ammo shortage draws down.

www.gunsnet.net/linx310/bump.htm

Here is a very informative link. BigAKFan

ETA: Retarded but VERY FUN!

Another cool bumpfiring link: www.ak-103.com/gallery.html 2nd from the top on the right.