The plugin we have used for a long time to modify stack sizes has not been updated since the November wipe. This has caused some issues with new items like the Handmade SMG. We have decided to switch to a different stacks plugin and have rolled it out with the 5:00pm reboot. Please let us know on our Discord in #admin-help if you notice any issues with stacks. All stacks should be 500k with the exception of photos and headbags.