ATLAS BT15 3.35in Flush Cup 1913 Rail, Radius Back, hole patterns, Black, 1.76-2.78 in
The BT15 3.35-inch 1913 rail will accommodate hole patterns with a center-to-center spacing of 1.76 to 2.78 inches and a relieved backing to accommodate curved surfaces. Machined to Picatinny rail standards from 6061-T6 aluminum with Mil-Spec Type III Class 2 finish. Available in black only.