The Bushmaster rifle was a 5.56x45mm firearm produced the Gwinn Firearms Company, and later Bushmaster Firearms Inc.. The firearm was a new design, having a tipping-block bolt system combined with a gas system similar to the AK-47 rifle. Production ceased in 1991 following Bushmaster's acquisition by the Quality Products Company the previous year;[1] the company now known as "Bushmaster" is primarily known for making the more common AR-15 type rifles.