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Called the LE901-16S, Colt's 7.62x51 mm NATO is an "out-of-the-box" concept that's a marriage of the AR-10 and AR-15 platforms. An adaptive rifle that uses a highly modified and upgraded AR-15 lower receiver with an equally unique AR-10 magazine well, the LE901-16S quickly converts to an M4-type carbine in 5.56x45 mm NATO. Conversions for the AR platform aren't a new innovation, but Colt's LE901-16S is a unique adaptation.
Learn more about the gun's design in this segment from American Rifleman TV.
To commemorate the 80th anniversary of the Battle of Iwo Jima, Auto-Ordnance teamed up with Altered Arsenal to create a specially crafted version of the M1 carbine.