The Silver Bayonet is a new set of rules from Joseph A. McCullough and published by Osprey Publishing and a book I am very much looking forward to purchasing when it is released (publication date - 11th November). For more details see this link.
There is a pre-publication review over on You Tube from Wargames Illustrated which should answer any questions you may have about the contents. The review is an extensive 35 minute tour of the new book and showcases some of the new miniatures from North Star. For details see this You Tube link.
I've written about this rule book in earlier post and am looking forward to picking up a copy as I think it will work well alongside Flintloque/Slaughterloo.