Many of our storefront systems are impact tested and utilize either our MegaThermÂ®, or ThermaBond PlusÂ® thermal barrier technology to improve performance and enhance occupant comfort. All YKK AP products are manufactured, finished, and inspected for quality in our environmentally certified, state-of-the-art facility in Dublin, GA.
A milliradian, often called a mil or mrad, is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian). Mils are used in adjustment of firearm sights by adjusting the angle of the sight compared to the barrel (up, down, left or right).
Definition of mil. 1  1 : thousand found a salinity of 38.4 per mil. 2  2 : a monetary unit formerly used in Cyprus equal to 1â1000 pound. 3  3 : a unit of length equal to 1â1000 inch used especially in measuring thickness (as of plastic films)  4 : a unit of angular measurement equal to 1â6400 of 360 degrees and used especially in artillery.