These are AR-15 iron sights and will likely have a height of approximately 1.41" as that is approximately the height of a standard AR-15 front sight height aperture from other companies, but unfortunately Tacfire does not provide specific information like that and you would need to reach out to them directly to verify the exact height of the rear aperture and front post.
Yes, these will fit the rails on the S&W M&P15-22.
Yes, the Tacfire AR-15 Same Plane Flip-Up Iron Sights come with a front and back sight.
Yes, the Tacfire AR-15 Same Plane Flip-Up Iron Sights have two different rear flip up rings.
The Tacfire AR-15 Same Plane Flip-Up Iron Sights will only fit on a standard picatinny/1913 rail.
These will only mount to a picatinny rail. If you have a handguard that is entirely M-lok on top, then you will need to get some sort of adapter to be able to mount a front sight to it. I would recommend reaching out to the manufacturer of your handguard to verify what options are available for their handguard.
These sights will fit any AR-15 upper that has a top rail and handguard that is on the same plane as the upper.
Yes, these sights will fit a UDP-9 as long as the handguard has a top rail on it.
Polymer - we'll have the page updated and apologize for the confusion.
No, the point of aim off the rail is approximately 1.5".