Holy Mother of Muzzle Flash, the Rico Special

Rico is a gunsmith at SIG Neuhausen who likes to tinker. He put together this SIG 510 (aka Stgw 57), with a modern collapsing stock, quad rail foreend, Aimpoint red dot, heavy barrel, and massive muzzle brake. And we just happen to have some 7.5 Swiss and a full-auto grip assembly. How hard can it be?

Thanks, Rico!