Barrier Gate Operator When a full size gate is not required, Barrier Gates are the solution. From 10’ arms to 30’ arms, we have the operator for you. Units run on either AC or DC. The DC units have built-in battery back-up. Brands we carry include: Viking, Apollo Gate Operators, Magnetic Auto Control, Engineered Parking Systems, Inc., Linear OSCO Operators, LiftMaster Mega Swing.