The E-VOLV Picatinny rail attachment E2PR2 allows you to mount a rail through the vent holes, while at the same time the Picatinny Rail giving you more mounting capability. Designed for standard and thickened heat shield, the Evolv Picatinny Rail will never scratch or melt... The beasts over at Mission First Tactical fired off over 1000 rounds in one sitting, and the E-Volv Picatinny Rail was still safe to the touch. This product is on sale...so buy with confidence! Check out our line of mission first tactical equipment!