Interesting but questionable

Even if there really are 4 triggers and 4 hammers (which can't be seen) it would still not deliver more firepower than the most basic pumps, which hold at least 5. This doesn't even take into consideration how burned his left hand will be. Real? I say an interesting photoshop by a non-hunter.

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Update: Well, apparently there really IS such a thing. Why? Still don't know the answer to that.