Optic rail with Picatinny standard profile for Beretta BRX1 rifles, compatible with all calibers. 0 MOA inclination. Made of burnished tempered steel. Standard Size, ie with "overhang" like the original. Use the original screws (# C5F544) and recoil lug (#C5G222) for installation. Ensure any old thread lock is cleaned, the surfaces degreased, and threadlock is reapplied for proper installation.