Ten Point ACUdraw 50 Accessories Replacement Covers Md: HCA-455 Made from ABS (Acrylonitrile-Butadiene-Styrene), our easy-install, sleek ACUdraw 50 covers contour to fit the stock better and are less bulky than the previous covers. Functionally, the lightweight covers also improve the alignment of the mechanism’s hooks and handles in the housing for improved security when not in use.