C&H Precision Duty XL, Red Dot Sight, 1X Magnification, 28mm Objective, 30 MOA Circle 3 MOA Red Dot, ACRO Footprint, Black RD-DUTY-XL-RD-MR The Duty-XL is a rugged, sealed pistol optic with a Closed Emitter design, ready for duty. Never worry about dirt, dust, or water clouding or disrupting your dot. This double bar side-clamping optic is sure to be the best companion for your duty, carry, or competition gun. The new double-bar feature ensures a rock-solid mount to prevent any movement.