How about being a witness to a long and complicated historical past. (See, I'm into milsurps as well as others.)
How about being a record of craftsmanship of people who did a lot with very little in terms of modern machenery.
How 'bout being tangable representatives of the genius inventors such as J. M. Browning, Gerand, Stoner, Colt, S&W, Sharps, etc.