Fair enough.
It says, according to the book, that they were in the Battle of Chateauguay and were Reserves in Lundy's Lane. I'll admit, the 5th Battalion did not act as a significant force in the war. But I still think for a war of 1812 mod they should get the Rifle spot for the UK, for the sake of the 7th Battalion's Rifles fighting also.
Or just give them lights, even though I'd rather see the Montreal Volts :/