I have the same rifle...
Also check out Williams Sights, as they make fiber-optic front sights in various heights for muzzleloading rifles. I mounted one on the front of mine, for when the deer are in the fir thickets so I can see the sight.
On the rear, I don't have fiber-optics, as I replaced the rear sight with a T/C Hunting Peep sight. It's made for the Hawken, so I had to use a yardstick across the original sights to figure out how high of a front sight I needed with the new rear.
Williams also makes a "twilight aperture" which I mounted in my peep sight. It's a hunting-sized rear peep that appears as a "ghost ring" when you shoulder the rifle, and it doesn't block out the view like a typical target peep. What gives it the "twilight" name is a narrow band of brass inset inside the aperture, which you don't see during the good light hours, but faintly shows up early in the AM. I can vouch for that, as I have the same rear peep on my Marlin 39M .22 with a fiber-optic front, and those sights work really well for me in dim light.
Tight groups!
Old No7
