Command Arms AR15/M4 Collapsible Stock Saddle: * The Command Arms AR15/M4 Collapsible Stock Saddle easily installs onto M4 style stocks * A proper cheek weld allows for quicker target acquisition and comfort * Securely attaches to most collapsible stocks with supplied hardware * Made from fiberglass reinforced polymer for strength and functionality * Waterproof, sealed battery compartments hold 4 AA or 6 CR123 batteries * 223 cleaning kit