The Bushmaster Arm Pistol was a 5.56×45mm NATO firearm, categorizeable as either a long pistol (under the American legal definition of a pistol) or compact carbine rifle, produced by the Gwinn Firearms Company, and later Bushmaster Firearms Inc.

The firearm was a new design, having a rotating bolt combined with a long stroke gas piston system similar to the AK-47 rifle.

[2][3] Some AR-15 parts were used in its construction and it used STANAG type magazines.

[4] Production ceased in 1988 for the pistol variant and 1991 for the rifle following Bushmaster's acquisition by the Quality Products Company the previous year;[4] the company now known as Bushmaster is primarily known for making the more common AR-15 type rifles.

[5][4]