The A.R.M.S.® #40™ 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 in 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. Has horizon line notch" 500-600 meter sight. Windage adjustments .75 MOA.

Features:
Stand alone flip-up sight
A2 aperture
Leans to the rear so as to fold in the correct direction if dropped and maintains their zero for accuracy