ACF 50-6" OUTSIDE BRACED SLIDING DOOR BOX CAR - McCLOUD RIVER - N Scale. Born from the Incentive Per Diem boxcar boom of the 1970s, the 506" Outside Braced Boxcar was designed to fill a growing demand for freight equipment. The IPD program, authorized by the Interstate Commerce Commission to encourage new boxcar production, allowed freight car owners to charge an additional fee when leasing their rolling stock to other railroads. Many shortline and regional operators jumped at this opportunity, and the bulk of these new cars were ordered by small and relatively unknown railroads. Today, the 506" boxcar continues to be a mainstay of freight consists, and while most are now maintained by specialized leasing companies or class one railroads, many continue to display the liveries of their original shortline owners - reflecting a curious and colorful era in freight railroading history. American Car and Foundry (ACF) is one of the largest manufacturers of railroad box cars. The box car is a versatile freight car since it can carry most loads. 50’ Sliding Door Box Cars were used by a wide variety of railroads and other commercial companies. Bachmann’s Sliding Door Box Cars come in a variety of colors and road names. Each car is fully assembled and features; Moveable Sliding Door, Highly Detailed Painted Bodies with Precision Graphics, Blackened Machined Metal Wheels with RP 25 Contours, Magnetically Operated E-Z Mate® Couplers, Non-magnetic Blackened Brass Axles with Needle-point Bearings, Celcon Trucks, and Added Weight for Optimum Tracking Performance.