Board Thread:Off Topic/@comment-25396609-20170505174118/@comment-27144409-20170604234319

The Dust variety pack would be the easier option for many portable. Also,  you could go with 5.56 or something less powerful. It doesn't  have to be a full rifle caliber.

Heck, you could for the "death by a thousand cuts" option and use 9mm Parabellum, relying on the cumulative damage. An example of such a premise in action would be the American 180 that was rather recently covered on forgotten weapons. Even .22LR can bring down a barricade if you fire enough of them at a sustained high rate of fire.