All RUSAN Picatinny rails are made of high-strength STEEL.
The finish is black burnished. Manufactured to strict tolerance of the PICATINNY NATO STANAG standard.
Mounting screws for screwing into the existing holes of your rifle are included.
NOTE: Sauer 303 ISI (rifles made before 2019) rails might need to be slightly filed on the underside for a perfect fit as not all rifles have the same tolerance. It's a very easy, 10 minute job.