Reinforced firearm sight support ring

A reinforced scope ring for installation on a firearm mount having a plurality of evenly spaced transverse notches, comprising:

• a semi-cylindrical base member,
• said base member defining an interior semi-cylindrical surface terminating in first and second opposing substantially co-planar elongate flanges;
• a semi-cylindrical top ring member having a semi-cylindrical interior surface terminating in third and fourth substantially planar elongate flanges and dimensioned to provide clamping force against said base member flanges;
• said base member further including first and second transverse through-bores and first and second transverse grooves;
• said first transverse groove being aligned with said first transverse through-bore, and said second transverse groove being aligned with said second transverse through-bore;
• a first transverse lug adapted to be received in said first base transverse bore, said first transverse lug having a substantially rectangular cross section and sized to be slidably received in said first base transverse groove;
• a second transverse lug adapted to be received in said second base transverse bore and having a substantially rectangular cross section and sized to be slidably received in said second base transverse groove;
• said first and second base transverse bores being spaced to position said first and second transverse lugs in alternate notches among first, second and third evenly spaced transverse notches, wherein a first notch engages said first transverse lug, a second notch is disposed between the first and third notches and the third notch engages said second transverse lug;
• said semi-cylindrical top ring member and said base member defining a cylinder bore having an axial length and a bore inner diameter, said cylinder bore having an axial length greater than said bore inner diameter.