It's a picture without context showing the modification of a shotgun.
There are two main possibilities:
That the picture is genuinely part of the one less movement, offering the possibilities that this is one image is part of a sequence showing the total destruction of the weapon or a symbolic destruction which was completed off-camera; or that the image shows the incomplete destruction and accidental felony;
That the picture is not genuine and was made by someone with a knowledge of federal law as a troll image.
There is a third possibility, that the image comes from a genuine destruction sequence and was co-opted for use as a troll image out of context.
Until the owner is traced and questioned we won't know either way. At this stage we don't even know that they are a US citizen or reside within the USA.