Guys I can't thank you enough for the info. I'm sure there will be many more questions you will answer for me in the future.

As a matter-of- fact I feel one coming on now.

I not thrilled with the wide aperature of the rear sight in relation to the front blade. Without going through the expense of buying a NM sight would it be possible to drill and tap the standard aperature and install a NM aperature alone? I'm not looking for the MOA adjustments of the NM sight, just a tighter aperature.....what do ya think?

Again, thanks guys......Carl