A.R.M.S. #40Std A2 250-300 Meter Backup Iron Sight (#40A2)
The A.R.M.S.® Stand Alone Flip-up sight, utilizes the same well proven concept as the rear sight on the SWAN® Sleeve system. The unique design of the spring loaded rear sight, ensures constant battery action and repeat zero. The sight is held in the locked down position by a quick release lever, that prevents the sight from being accidentally engaged, but is as fast as a trigger to release even with arctic mittens.
Flip up rear sight uses the standard A2 rear sight apertures. The initial elevation zero utilizes the standard M16/M4 front sight bead. Other type rear iron fold-down sights require the shooter to push it into position, which means they can be accidentally knocked down at the worst time.
The A.R.M.S. spring loaded flip-up sights never let you down, because they're designed to always be there even when going thru brush or being dropped.
Windage adjustment: .75 MOA Increments