Under the guidance of former Marine and former Army Ordnance technician, Eugene Stoner, the AR-10 became the main focus of attention. Army officials asked Armalite to develop a smaller version of the AR-10 in 1956 as a potential replacement for the M1 Garand. The ensuing rifle was called the AR-15 and was produced with aircraft grade aluminum receivers, weighing less than seven pounds. In 1959, the AR-10 was licensed to the Dutch Arsenal, Artillerie Inrichtingen, for sale on the international market and then to Colt’s Patent Firearms Manufacturing Company, along with the AR-15. Shortly thereafter, Armalite began development of a new rifle, the AR18. Development of the AR-16 (which was later dropped due to the Army’s adoption of the M-14) and AR-17 12-gauge shotgun begins. The AR-7 Explorer becomes the first commercial rifle produced by Armalite. It is the civilian version of the Air Force adopted AR-5 Survival Rifle.