The upgrade of the BRC-60 was the BRC-40. A full 2,605 pre-standardized units were built to this design in 1941, most of them supplied to Allied nations under the Lend-Lease program. The BRC-40 was built in two versions: the Series 1 and the Series II. Series 1 rigs can be identified by their corrugated floorpan. BRC-40s were the lightest and most nimble of the three pre-standardized models, and the Army noted that this model had good suspension and brakes and high fuel economy. This BRC-40 belongs to noted pre-standardized Jeep restorer Ken Hake. The 37mm anti-tank gun is a period accessory.