It’s a canon, but what sort?

[kronckew]

carronades were also made by Bailey Pegg and Co. & i'll assume others, possibly other countries as well. the OP's one being bronze with a steel liner hints at a non-UK origin, as UK carronades were cast iron, no matter what we finally agree to call it.

here's two BP prepared earllier: with low-ish trunnions. the carriages look a bit suspicious, tho i found a pic of a similar carriage at carron iron works.