The gun is made of aluminium, therefore not strong enough to convert some real ammo.
Thats why the smart home construktor could get a Darwin Award than.
"The Darwin Awards salute the improvement of
the human genome by honoring those who
accidentally remove themselves from it..."
Problem could be that there are some people who killed themself with tring to convert blankguns to normal ones.
(the second part of my post is rather a joke)
.