This is a Magpul Industries Cheek Piece known as the Cheek Riser AK, model MAG445-FDE.
Tool-less clip-on cheek risers for the MOE AK and Zhukov-S Stocks. Gives the user the option to raise the cheek weld .25" .50" or .75 inch in height. Will not interfere with storage access on MOE Stock or the folding mechanism on the Zhukov-S Stock. Made in U.S.A.
Features:
Tool-less clip-on cheek riser
Fits MOE AK and Zhukov-S Stocks
Gives the user the option to raise the cheek weld height 0.25"
