The Fourth Edition of GURPS High-Tech (see here for earlier editions) covers weapons, vehicles, and gear from the early modern era on. From the publisher's website:

All the Gear Is Here!

In 256 meticulously researched pages, GURPS High-Tech gives descriptions and stats for hundreds of kinds of historical weapons and personal armor, vehicles from the stagecoach to modern helicopters, and much more.

GURPS High-Tech also has the gear and gadgets characters need. Communication, from early telegraphs to modern computers; tools of the trade for detectives, spies, and thieves; camping equipment, rations, and first-aid kits; business cards, watches, and fashionable duds – this book has everything, for encounters from the wilderness to high society and everything in between.

GURPS High-Tech is the complete resource for equipment from the 18th century through the modern age, and will be appreciated by Game Masters no matter what system they use!