OK, a bump fire stock might be useful in a “Red Dawn” scenario (assuming a LARGE ammo supply), for suppressive fire on an objective, but apart from that, it’s just a (fun, from the looks of it) ammo-waster.
Saw a comment (sans clear reference to a transcript to an NPR segment that apparently aired in the past couple of days delineating the differences between bump fire-enabled and full auto firearms. No details in the comment; just a wee bit of amazement that such a thing would air on NPR. . .
Interesting comment elsewhere (Quora) that I immediately juxtaposed with visual evidence:
“Bump fire allows you to keep your finger in place while the gun moves. However, it is still only firing a single shot per pull of the trigger. The trigger is just being pulled faster than a person could manually do without bump-fire.”
The visual evidence I juxtaposed with it? A video of Jerry Miculek firing an AR-15 vs “some guy” (I dunno/can’t recall who, although I’ll post the video and we’ll all know then *heh*) firing a bump fire equipped AR-15. The bumpfire weapon did “outrun” Miculek by a split second, but Miculek’s shots were all on target and better-grouped. No one who’s not in a very elite group of shooters can do that, but no one–even the fastest finger in the world, if such can be definitively determined ;-)–can come even that close to even the slowest genuine full-auto.
And every example of bumpfired weapons I have seen shows that accuracy suffers a great deal. Just sayin’. If it comes to a “Red Dawn” scenario, use your handgun to get to your shotgun to get to your rifle, and use your rifle to “capture” more advanced weapons and ammunition. *heh*