I ordered the RMC V Peep sight to try out on my TC muzzleloader. The sight is constructed from aluminum and the windage and elevation adjustments are made using tiny allen head screws ”“ the necessary allen head wrenches were provided along with the sight. The aluminum V Peep sight just didn’t look right or give me a comfortable feeling since it is secured onto the barrel with only a single screw, unlike the 2 screws on the original TC rear sight. On the range, I noticed that the windage and elevation screw heads started to round out with making repeated adjustments.
I have had much better success with Marble sights. They are constructed from steel and offer easier windage and elevation adjustments over the V Peep. Marble offers models in the v blade as well as peep sight versions. Prices of the Marble sight were comparable to that of the V Peep.
Refer to the below URLs for more info.
http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=26668&title=#specs
http://www.brownells.com/aspx/NS/store/ProductDetail.aspx?p=16738&title=#20 UNIVERSAL REAR SIGHT