well lets not forget still muskets and flintlock weapons are in, so havin an rcf with a butt attack provided it is ancient i think it's ok.
on the other hand handcannon and boardin gun are quite primitive, so these should be avaiable in the early game for manufacturing, might only require:
"primitive weapons"
"smithing"
"fire walk with me"
"flintlock and bombs"
i think currently are manufacturable at the extractor, right? For balancing purposesi'd lower the handcannon rounds damage to 35, and make the homefront rifle lighter than the rcf.
Edit: please also do consider that all the above mentioned guns are black market stuff, but most of these are meant to be junk. And mind also, since in the game are peasants, pitchforks, axes and boathooks (well it's more of a fisherman thing) how about to add a
scythe or even a
hoe? Along with bare hands, pitchforks and billhooks, any peasant recruited will have to come by wielding one of these by RNG.