Seat depth - Firefield 45 Degree Weaver Picatinny Mount

I bought these to add back up, flip up iron sights to my rifle set-up. My top mounted sight is not QD and its battery operated so I wanted something I could switch to quick in cqb. I don't know how else to explain this but the rail cut out was not deep enough to seat the sights. I ended up just using the old dremel and cutting it enough to seat my sights. Honestly I wish I just spent a little more money and got a better pair. I got mine to work but I won't be buying these again. It's ironic because they fit the rail on my rifle perfectly. So Firefeild knows how deep to make the screws and bottom piece but their actual picatinny rail is not cut correctly.