2021 update. I have the materials to make 4 more here, just need to find the time. Buyer pays shipping Custom high cap drums for the KWA VZ61 SKORPION GBB I've been making these for a several years, they've come a long way, and are now rock solid and fully serviceable. If you search my name on YouTube, you can find some videos of older mags being test fired. I'll make a good new video sometime soon. They hold roughly 300 rounds, feed on full auto, and are filled via the fill port on the side, you can use aeg midcaps to quick fill the mag midgame.