Full Picatinny Rail CoversThe RC Full Picatinny Rail Covers provides a superior tough polymer cover slide over your Picatinny rails. Includes Blister pack containing 3 black rail covers. Advantages Furnishes contour of a Rounded, Smooth, Circular Handguard Protects Shooter's Hand from Sharp Edges of Unused Rails and Barrel Emitted Heat Facilitates Appropriate Thermal Insulation Protects Exposed Rails from Damage Renders Rail Less Vulnerable to Snag On Clothing and Equipment