The DPMS Evolution Rail is an adaptation of our popular Evolution Series rail. This rail is built specifically for the DPMS LR-308 receiver geometry. Included is a modified DPMS barrel nut which is required for installation. Kit includes (2) 2" accessory rails, (1) 4" accessory rail and all mounting hardware. No thermal bushings are required for installation. Will only fit .308 upper receivers with the DPMS low profile receiver height (i.e. Smith & Wesson M&P10)FEATURES: