The optic cut on this Nighthawk Custom 1911 is their Interchangeable Optic System, which puts the rear sight in front of the RMR. I don't believe that it will affect the RDS cut on the holster but wanted to make aware if it required a deeper cut. Thank you and have a great day.

Needs to fit USP9 Tactical that has factory suppressor height adjustable night sights and a Streamlight TLR-3 installed directly using the USP full size clamp provided by Streamlight.