This one comes with a 35 round drum and a sling, but I snapped some pics right after assembly and testing; so it has the 18 in it for now.
The folding fore grip is specifically to help with the bulky 35 round drum, which is awkward on the SMG variants.
12.6v, restrictor removed, padded, 6kg OMW spring. With the short barrel it's hitting up to 65ft.
I couldn't think of a name and will likely change it; it has a hammered finish and shoots hard - for now it's 'The Hammer'.