Some fairly interesting firearms history can be found in this slide show about 5 guns that truly made, if not changed, history.
See it here: http://www.mandatory.com/2012/05/13/5-guns-that-changed-history/?ncid=txtlnkusaolp00000058&#photo=1
Make sure to click on "more" on each page to be able to read everything they have on each of the guns.
All the best,
Brass Balls and Fast Hands
49 minutes ago