Foregrip mounts onto M-LOKA(R) slots of a handguard. Storage compartment with tight-sealing door for batteries and cleaning supplies. Designed to be grasped by the support hand for better support and pointability. Brand: NcStar Includes: M-LOK Foregrip Materials: High Quality Polymer Compatibility: AR-15, Rifles with bottom M-LOK base Weight: 2 oz Length: Rail Mount: 2.0 in, Handle: 3.8 in Color: Black Warranty: Lifetime