Brokennock
Cannon
For what time period? And, how many compared to those properly built? Were they built this way or were they make do restockings of gun parts from a broken stock?Perhaps, but there is evidence of plain guns, shimmel guns as they were called where I live, usually in smoothbore. Few farmers afforded the expensive examples, but older smoothbore guns fit the bill for general protection of homestead and livestock.
I've seen very simple examples, quite unadorned, that have a charm to me that later rifles (bedecked in brass and carvings) just don't hold. As one gunsmith told me, "We have examples of fancy rifles because they were expensive and well cared for, we have parts of shimmels because they were worked to death." Could be true, could just be anecdote. Sort of like people preserving a muscle car but not a Ford Pinto.
As to the OP, mounting a forward screw for the lock would make it appear more historically accurate. Butt plate would be fine but perhaps not necessary.
I'm sorry, but this still sounds like justification of what someone wants more than evidence based conclusion.We have examples of fancy rifles because they were expensive and well cared for, we have parts of shimmels because they were worked to death
"I want to have/carry/make, a cheapest, easiest, most simple gun I can. What can I leave off, and how can I justify it?"
Then we apply our modern logic and tell ourselves only nice guns survived because only wealthy people had then and didn't really use them, and of course those that did were to ignorant and slovenly to take care of their tools.