Krebs Custom M1913 rear ADJUSTABLE HEIGHT STOCK ADAPTER
(CLAMP) Allow stock height adjustments in 0.050 increments. Precision stock height, adapter allows you to pick any stock height and moves in .050 increments less than a 16th of an inch the graduations on the Picatinny rail are.394 apart over 3/8 of an inch
7075 Aluminum
Hard coat Black anodize.