The Magpul ACR stock seems to go well with almost any rifle. Polenar Tactical posted up this AK on their Instagram account and it is sporting an ACR stock. Here are some other popular examples of ACR stocks on non-ACR rifles.

CZ Bren

DS Arms FAL

Robinson XCR

FN SCAR 17S

H&K UMP

Which one do you think makes the best use of the ACR stock?