Board Thread:Off-topic discussion/@comment-39814790-20200221172851/@comment-27306930-20200302164700

Having examined the ULTRAs up close, I don't see any reason why a double stack mag couldn't work. The heads are rubbery, but they're slightly recessed, so the smooth outer body of the darts is the only part that comes into play, as far as friction goes.

Maybe when they release more mag fed ULTRAs, someone will get the bug to design one.