JMac Customs HRD-1 M-Lok Handstop, Black

(H)and(R)etention(D)evice Compact, lightweight, & reversible M-Lok Compatible - Fits in and across M-Lok Slots Includes mounting hardware 7075 T6 Aluminum Hard Coat Anodized The quarter-turn T-slot nuts have different torque specifications depending on the handguard material: 4.0 N?m (35 lb?in) for attaching metal accessories to metal handguards. 1.7 N?m (15 lb?in) for attaching polymer or metal accessories to polymer handguards.