First, it's a lie.
And if it wasn't, its brother is an idiot too.
A couple if tip-offs that this
is at least partially fictional:
* The DU-member makes a big deal of how the supposed brother cleans and cares for his weapons. A real gun enthusiast would have set dumb brother straight in two sentences:
"I invested $X00 or $Y000 in this ______. Damn straight I'm taking care of it!" IOW, if DU-member really had a gun enthusiast brother he would know there was nothing remarkable about taking care of the guns.
* IRL, gun enthusiasts are protective, not only of there own rights, but the rights of all gun owners. They get, "First they came for ...." So the conclusion of this
is dubious on its face.