[@smarty0114] Okay, the Cs looks good for the most part. My only concern is the revolver/bullets. Now, there were revolvers but they had mostly just been created to effectiveness , (first patent for one didn't come around until 1811) - Colt being the first to mass produce them decades later. Before Colt, they were nearly impossible to come by, hard to use, and very very costly. Also, there were no bullets persay at this time. Revolvers were caplocks still at this time and  were loaded the muzzle loader way - loose powder, pistol ball, percussion cap. First self contained cartridge wasn't introduced until 1854. 

Now, Collier did patent a revolver in Britain before 1820 and thousands were made but they were not reliable due to it being a flintlock - flints had to be replaced constantly, and they misfired a LOT. 

Considering he is a young merc - Might I suggest either switching out to a pistol (As single and double dueling pistols would be easy enough to him to "lift" from some Peer) - or even a rifle (and switch out dueling since that is more of a highbrow thing) for a rifle skill under general? A Baker Rifle would be rather easy to get a hold of during this time and was accurate up to 300 yards even in the 1820's.