Mighty Pen Co Pens

[EZ Bake]

Out goofing off with the camera (I don't know what I'm doing with it yet), and decided to snap some shots of some pens I got recently from a guy locally here in Oklahoma. He made the nickel pen out of brass that I shot through one of my bolt-guns. That's kind of a cool sentimental treat for me (I'm corny like that though).

Anywho, here's my attempt at some pics (I'm still figuring out this camera):

 

[Dago Red]

cool pens, what holds the cases together? How much does he charge for them and what variety of cartridges could he use for it? Thanks.
Red

 

[EZ Bake]

The bottom casing/outer-layer is mounted to the pin-guts (it's twist-to-open). The top part slides over the re-fill (it's a pretty snug fit).

I want to say that it's a Cross refill. He makes them in a lot of different calibers. Most of the standard calibers he offers are $20 (the larger calibers and magnums get into $30). I don't want to get in trouble by posting a link, but if you google "The Mighty Pen Company" you'll find it.