Adopted by the U.S. Army as their primary sniper rifle in 1988. Standard 24 inch heavyweight stainless steel barrel with 1:11.25 5R rifling, drilled and tapped for a sight block at the muzzle, "U.S." marking above the serial number on the left side of the receiver ring, bolt numbered "0644", Picatinny scope bases mounted on the receiver with a correct M24 Leupold Mark 4 M3-10x40 mm scope. Correct M24 H-S Precision PST-024 composite stock and adjustable buttplate with solid rubber recoil pad.