Mission First Tactical E-VOLV Battle Stock Attachment for MFT BattleLink Stock, Flat Dark Earth Quick Detach Sling mounting point and sling slot (2) watertight storage compartments that separate batteries to prevent charge offs and reduce rattle Easily affixes to collapsible buttstock (may not work with non-standard models) Upper section provides enhanced cheek weld Holds three batteries per sled for a total of six batteries