The Colt LE901-16S is Colt's entry into the .308 AR market, featuring a unique design allowing the lower receiver to accept a standard AR-15 upper via an adapter block — enabling the LE901 lower to function with both .308 and 5.56 uppers. A 16.1-inch chrome-lined barrel runs a carbine-length gas system. The adapter-compatible lower was a key differentiator in the .308 AR market. Type: Rifle Action: Semi-Automatic Caliber: .308 Winchester Capacity: 20 Year introduced: 2011, USA Weight: 9.5 oz Overall length: 35.75" Status: Discontinued Intended use: Tactical, Law Enforcement, Hunting