The ARFX is 3.6 oz lighter than the A2 stock, while still retaining high strength and durability. A closed-cell foam "overtube" provides a super comfortable cheek weld, and it insulates the shooter's face from vibration and temperature extremes. The ARFX also sports three sling positions: right and left behind the receiver and one at the toe of the butt. Uses a standard A1/A2 receiver extension tube, buffer and spring (included ). Includes .5" thick rubber "over-mold" recoil pad. Can be installed on " Post Ban" rifles.