I bought two sets of this sight with the fiber front for my two Sig P320s. Both rear sights required no fitting. They were so loose in the dovetail of the P320 slides that I can push them all the way through by hand. I tried each sight on each slide, no combination was tight enough to be acceptable. Unfortunately I fitted the front sight first. It required significant fitting and the steel was so hard that I destroyed a very expensive file doing so.

Nice design. I like a wide, u-notch rear and this fits that requirement. It inserts into the dovetail easily and is secured in place by a set screw, which makes for easy windage adjustments. The rear is serrated to reduce glare and so is the front to help with catching pockets or holders to aid in 1-handed slide racking. Nice product. .

I have several 10-8 sights and love them. I waited while they mfg'd the one for the Sig, and I'm glad they did. Fit my P320 perfectly.

Great sight! Fit my 210 perfectly and I can't wait to get it on the range.

Dovetail was absolutely perfect, simple swap out with a sight pusher. I really like the U-notch. Bought this with the F/O front sight to give a familiar look and feel to my primary guns which are all set up that way.