Hi, i'm new here and i hope i got this in the right forum, but a few years ago i got a Remington model 510 Targetmaster .22, i have fallen in love with this little rifle, and just made a custom thumbhole stock for it, i would however really love a scope. I heard somewhere that someone removed there rear iron sight and put the mount there, i would just like to know is this possible? or do i have to get this thing drilled and tapped for a new mount? and if so, how much does that normally cost? I don't know the exact diameter/depth of the screws, but they are just about six tenths of an inch apart.. PS: It looks the same as this, just a little less rusty. http://forum.gon.com/attachment.php?attachmentid=271278&stc=1&d=1237323920 Thanks for reading!