C&H Precision Duty, Red Dot Circle, 1X Magnification, 16mm Objective, 30 MOA Circle with 3 MOA Red Dot, ACRO Footprint, Black RD-DUTY-RD-MR The Duty is a rugged, closed emitter pistol optic that is sealed and ready for duty. Never worry about dirt, dust, or water clouding or disrupting your dot. This side-clamping optic is sure to be the best companion for your duty, carry, or competition gun. It is available in red, green, and multi-reticle versions.