And to further shag things up, many armies dated only the LOCK of a firearm.
If the Barrel is the Antique part, then what do you say about a Snider with an 1861 Lock, an 1861 Stock, an 1866 Breech..... and a 2013 Barrel to replace the rusted-out one that once was on it?
Replacement Barrels have been available Stateside for almost 50 years now and are still in production. There must be THOUSANDS of 1863 Remingtons and Springfields out there with completely-original Locks and Stocks and replacement Barrels..... and completely-original rifles with replaced LOCKS..... and completely-original rifles with replaced STOCKS.
It's like the story of the Old Man's Axe: replaced the handle 3 times and the head twice and it's still the same one!
WHAT a stinking kettle of fish!