Bushmaster Firearms International was created in 1990.
Cerberus Capital Management Betcha can't guess who owns them
There is none it is a private company.
There are at least 2 different "Bushmasters". The automatic cannon known as the Bushmaster is made by ATK. The AR style rifle that is made under the Bushmaster brand is made by Bushmaster Firearms, which is part of the Freedom Group of companies which includes Remington, Bushmaster, Marlin, Parker, Barnes Bullets, Para USA, and others. H&K does not manufacture a Bushmaster.
Probably Cerberus Capital Investments (which owns Remington, Bushmaster, and DPMS)
DPMS/Panther Arms is owned by The Freedom Group which owns a wide variety of firearms and ammunition manufacturers including Bushmaster, Remington, H&R, etc...
Windham, Maine, although a lot of their parts are outsourced. For example, their AR-15 type receivers are manufactured by LAR Manufacturing.
Many firearms manufacturers are owned and operated within the US. Among the more prominent manufacturers are Colt, Kimber, Springfield Armory, Bushmaster, Browning, Winchester, Marlin, Mossberg, Remington, etc.
Firearms - Bushmaster, DPMS, Remington, Marlin, H&R, Dakota Ammunition - Remington Silencers - AAC
The Remington / Bushmaster ACR was originally developed by Magpul Industries under the monniker 'Masada'. However, Magpul did not have the production facilities required to bring the firearm to market; the design was then sold to The Freedom Group which owns Remington, Bushmaster, and other firearms companies.
Chiappa Firearms was created in 1958.
Llama firearms was created in 1904.
Benelli - firearms - was created in 1967.