The SAR (Sterling Assault rifle) was jointly engineered by Sterling Armaments and Chartered Industries of Singapore in the early 1980s as an advanced version of the AR-18 for the export sales. It was also introduced to the British Armed Forces, who refused it because they were already in the process of adopting the SA80 manufactured by Royal Ordnance Factories. The SAR-87 was a robust weapon based on the well tried AR-18 with the versatility of the M16. It could also be converted from 5.56x45mm NATO to 9x19mm Parabellum by changing the barrel and bolt assembly, to provide a submachine gun for Police forces. Once again, Sterling Armaments tried to push the rifle, renamed SAR-87, for some more years, but at the end of the 1980s, it was bought out by the British government and closed due to the British authorities didn't want a national firearms industry. Less than 100 SAR-87 rifles were manufactured.