I agree with 'crate. Its not so much they "don't have a sight" as "they don't have an easily adjustable sight.":hmm:
The double cut groove in the topstrap is surprisingly good & repeatable, mostly the front sight is my issue as I find it easier to find a much thicker type of blade. The Remington's top strap at least allows for the groove, unlike the Colt open top style, but, never having used a Colt type sight I don't know if the difference is that noticeable in reality.
I did file down my front sight blade once I'd come up with a load I liked, but that was a Remmy feature too, Colts shot High & Remmies shot low till you figured out the sight, or so I'm told. My attempt at just aiming off didn't work out too well for me so I "regulated" the front sight for height, next I'm going to drift it in the dovetail a smidgin to fix the 2" left offset at 15 yds, although I find that easier to live with for some reason.