Weltman showed me an ammo box two years ago with a standard feedneck size. I finally found one in a random box of gear off ebay.
Find ammo boxes forsale at:
http://www.baccipaintball.com/gear/hoppers-elbows/140-rds-and-smaller-loaders/wgp-ammo-boxes.html
On facebook at:
https://www.facebook.com/photo.php?fbid=322918697802112
