Quokka-15 Released

Description from the reddit post:

The Quokka-15 is finally done!

This is a successor to the Marsupial MK18 with: a single guide rod, a much slimmer profile, mil-spec lower compatibility, a refined sheet-metal trunnion and a folding charging handle.

My username is my username. (this is posted on behalf of WadeRoberson)

Thank you to themoosegoesmoo, some_kid6, CipherPrints2A, Damascus_2a, georgeofjungle, BLC and ciwielab.