TWP Cheek Riser Rest - Hight Increased Up to 0.75" Simple Snap On Installation On Most Collapsible Stocks With Fins (Ribbed) - No Tools, Gunsmithing, Or Stock Modification Required Provides Added Support And Ensures Correct Eye Level Alignment With Open Sights Or Optics For Fast Target Acquisition Great For 15M4 Style Collapsible Stocks Constructed Of Glass Filled Polymer For Supreme Lightweight Durability - Made To Withstand Harsh Tactical Conditions Cheek Risers - .7" High Risers (Black Color Finish)