TASS/. Russia’s manufacturer of ORSIS rifles (Promtechnologia) has come up with a smooth bore counterpart of the US assault rifle AR-15 (its military version is known as M16), the company said ...
The largest difference between the AR-15 and the M16 is in the barrels. The typical AR-15 has a 16-inch barrel, while the M16 is typically given a 20-inch barrel.