According to Military 1st, the Civilian Lab Smuggler Padded Sling Pack is available right now at their online store... "The Civilian Lab Smuggler Pack suits anyone who needs extra room.  This large sling pack comes with a lockable padded main compartment and three external pockets for a cleaning kit, mags and spare parts.
 
Specifically designed to accommodate carbines up to AK47 length, with magazines in and optics mounted.

Find out more at Military 1st online store.