Jim , I beat the same idea around a few years back .
Not for doing contemporary guns but museum originals .
As we all know , there is no way anyone of a right mind is going to allow any type of common molding materials to touch these guns . Even when it comes to the compression type foams there were concerns from those folks I spoke to .
At that time the 3D printers were just starting to be marketed to the public .
I also found that the 3D system had actually been around for some time in the automotive industry . While the public versions were not very accurate , the commercial versions were.
Interesting enough , GM had a hand held laser scanner that aloud an item to be scanned in 3D and would reproduce a hair laying on an item when imputed into the CNC printer .
I was told that this was how they reproduced their dash components from clay carvings . From those scans moulds were made for mass production .
The set up however was very expansive. Scanner was running in the 30 thousand range and the CNC printer . I call it CNC but it was more then that as it was capable of reproducing ,in wood , plastic or soft metals like aluminum . It also didn’t just use milling heads but also some type of laser burning?
. But to purchase one that was capable of doing a 36 X12X8 item was 50 +
In other words , one $#*! of an investment . But the tolerances that it would reproduce , was simply amazing .
One would have to sell a whole lot of items before it would pay for itself