Expand models

[coavins]

Maybe add more items to each model, like grip, trigger, mag well, hammer, firing pin, etc.

[coavins]

A discussion should happen here about how detailed we really want the models to be. How much is too much?

[macinsight]

I've been so far keeping it rather simple with just differing between caliber types and functionally radically different model types, so differing between a .45 ACP Glock and a 9mm Glock, but not between a .45 ACP Colt 1911 and a .45 ACP Glock.

So far there's nothing like a difference between a Glock 17 with a barrel length of 114mm and a Glock 17L with a barrel length of 153mm.