Robinson Armament M96 Expeditionary

The original design was called the Stoner 63 and was intended to be modular, meaning it could reconfigure from light assault carbine to heavy machine gun by switching out parts, depending on the mission requirements.  It, however, only saw limited military use.  This particular copy is a civilian-legal reissue by Robinson Armament that shares almost no part interchangeability with the original, and cannot be made into a machinegun.  It has a 20 inch quick-change barrel with integrated muzzle break, left hand bolt charging handle, uses AR-15 30-round steel magazines, and has an adjustable short-stroke piston gas system which is the hallmark of modern weapons design.  It is chambered in 5.56 x 45 mm NATO (.223 Remington).  The rear sights have two apertures, one for 100 yards and the other for 500 yards, but they have not yet been properly zeroed.