Battle Arms Development Workhorse Low Profile, Gas Block, .750, Matte Finish, Black, Includes Set Screws WH-GB-750 Established in 2009" Battle Arms Development" Inc. (B.A.D. Inc.) stands as a distinguished force in the realm of small arms innovation. Nestled in the heart of Henderson" Nevada" their company is driven by a relentless commitment to pushing the boundaries of small arms design and manufacturing.