A playtest version of the Musket to Rifle system (currently titled Height of Reason) is available if you email me at nordicweaselgames@icloud.com 

The test version only includes two scenarios and is missing various other components but it is a fully playable game with a variety of infantry and cavalry units to pick from. It currently covers the smoothbore era of warfare so up through circa 1840ish. 

Drop me a line if you are interested in helping proof read or playtest.