Killen Custom Airsoft shows the MK48 Mag Dump he made with an A&K M249 AEG... "Trying a mag dump of my Killen Custom Mk48! The real customized LBT Mk48 mag holds ~7000 BBs and is powered by A&K 1500 rds mag internals, wired to feed from the weapon's battery pack. Base gun is an A&K M249 with custom barrel and feedtray cover.

Sadly the battery died about halfway..."