North Korean helical magazines in 5,45x39mm for AK74 family

I saw this photo in a few places and decided to copy it as I find very interesting, It seems that both the Soviets and North Koreans are using helical magazines for their AK-74's and the North Korean copies It was reported that these helical magazines might carry 120 to 150 rounds of 5.45x39mm. The helical magazine fits the normal magazine well and extends forward. It would be nice to have one of these magazines !

This idea is not new and dates back to the blackpowder daysAttachment 60163

I saw them for sale at the Harrisburg Sportsman's show last Saturday. Different gun types and calibers. Don't recall the price as I had no interest in them. Just watched the video they had on display. If you want to waste a ton of ammo, that's the way to go.