I ordered a 5906 with adjustable sights and LE mags about 15 years ago give or take. I ordered it with the sights as I was a Model 19 guy at the time and it seemed the right choice for me. Recently, I used the pistol (which I really like) in some low light qualification excercises. Some guys had new M&P's with night sights. What a difference. Is there an economical change out for me to night sights? I really don't want to loose my adjustable sights in the process if I don't have to. Thoughts? Thanks.