Original sentence: Both manufacturer's have added additional refinements to the system, looking to improve on the design.Other manufacturer's in the United States have also taken up Minigun production.This include Dillon Aerospace, who calls their weapon the M134D, and Garwood Industries, who designates their system the M134G
Edited sentence: Garwood Industries has now made its self a major manufacturer of the M134G weapon system.Garwood Industries has set themselves apart from the competition by using and manufacturing mil-spec components