Shrewd Optum ring system 35 / 40mm no pin rc rest No annoying buzzing sound

No annoying buzzing sound

30mm scope rings to suit most Weaver rails

one for cool weather

Metal extension sight with micro adjust up and down and wind adjustment

Shrewd Optum ring system 35 / 40mm no pin rc rest No annoying buzzing soundOPTUM RING SYSTEM (O. R. S.) FOR THE 35MM AND 40MM OPTUM SCOPE THIS MUST BE USED IN CONJUNCTION WITH AN OPTUM SCOPE THE OPTUM RING SYSTEM (O. R. S.) MAKES IT POSSIBLE FOR SHOOTERS TO CHANGE PIN POSITIONS, FIBER COLOR, OR FIBER SIZE BY SWAPPING BETWEEN MULTIPLE RINGS IN SECONDS FEATURES: EXTERIOR FIBER WRAP THAT CAPTURES AMBIENT LIGHT FOR A BRIGHTER PIN ADJUSTABLE FIBER COVER ALLOWS PRECISE CONTROL OVER FIBER BRIGHTNESS TWO 8 32 HOLES FOR INSTALLING A