RAIL ADAPTER FOR SCOPES/RED DOTS. FITS A 3 BOLT, 135mm PICATINNY RAIL. THE NUTS FOR THE RAIL FIT FLUSH TO THE MOUNT TO CLEAR THE STANDARD SLIDE SIGHTS. I SET THE NUTS IN PLACE THEN USED A HEATED HOBBY TOOL TO GET THEM TO FIT CORRECTLY. USES 2, 5mm BOLTS FOR A SECURE FIT TO THE PISTOL FRAME. RIGHT HAND SIDE IS SLIMMER TO ENSURE ROUNDS CLEAR THE EJECTION PORT. MANUALLY CYCLED ROUNDS CLEAR FLAWLESSLY. WILL BE RANGE TESTING TUESDAY. ENJOY!