Command Arms AR15/M16 Cheek Rests, Set of 2: * The Command Arms AR15/M16 Cheek Rest provides a comfortable cheek weld when you use iron sights * Installs instantly on most collapsible stocks and can be positioned along the length of the stock to provide optimal eye relief * No tools required, snaps into place * Made of rugged fiberglass reinforced polymer to withstand harsh tactical conditions * Fits most AR15/M16 collapsible style stocks with fins * Set of 2 cheek pieces