I recently added a bolt top peep sight to my Rossi .357mag carbine and really like the increased DoF and clear sight picture the .040" aperture provides. So, I decided to add a similar version from Skinner to my Mossy 464 carbine so I ordered one from them earlier this week. It came in the mail today and in just a few minutes the job was done. It increases the sight radius almost 40% from 16" to 22", the same as my Rossi carbine. I also added a .040" aperture like my Rossi to take advantage of the DoF increase. Magically, like my Rossi, the fuzz that had grown on the front sight the last few decades are gone now. I also got a .070" aperture as well so I have 3 different ones (including the .096" one it comes with) for it. I'm going to the range tomorrow to give it a run along with my Rossi and expect that 200 yd targets will now be in mortal jeopardy as they are with my other leverguns with target apertures on them.