Tru glow sights from cabelas, They are $43. How much work to put on? oh about 2 minutes to take off your old ones and 2 minutes to put on the new ones. Just a couple screws/ washers and screw them on and you are done. Comes with 2 allen wrenchs to adjust with. Awesome sights and very nice to see with. 100 yards was bright and clear. My old ones were blurry. But i was really surprised how well those bullets shot. Makes me want to buy some powerbelts and see what they do. But after 14 shots with pyrodex rs, the last bullet loaded as easily as the first. Im still going to try those kleenbores out next time i go shooting and see if my groups tighten any. Im betting nothing happens other than a lot more fouling on my bolt area. This summer im going to build a shooting bench and get some sand bags, those suckers really do help out.