Hi Donny.  OHHHHHH.......thank you so much for the Link and photos.  I've never seen these before.  I'll save the Link.  Thank you!  
 
I notice in the photos that they are carrying newer made guns with percussion locks vs flintlocks, which would be much more convenient firing from horse back. Wish I knew who built those guns!!  
Meantime, here is a photo of an old French postcard I have.  Look at the length of the barrel on that Snaphaunce gun!!  

   Rick.