10″ Picatinny Rail

The 10″ rail is made from 6061-T6 Aluminum with a black matte finish. The holes are spaced at 3.5″. Both outer holes are placed at 1.5″ from the edges of the rail. The diameter of the through holes is 5/32″. The diameter of the countersunk holes is 25/64″. The depth of the countersunk hole is 1/4″ when measured from the top of the rail, and it is 9/64″ when measured from the bottom of the groove.