The Leopard 2A6M CAN is a Canadian variant of the Leopard 2A6M. Significant modifications include distinctive black boxes mounted on the rear of the turret bustle,^[142] and stand-off slat armour.^[143] The first tanks configured in this variant were 20 loaned from the German Bundeswehr in an effort to increase firepower and protection given to Canadian troops operating in the south of Afghanistan. The loaned tanks retain their German MG3 machine guns, the ex-Dutch tanks are also expected to retain their FN MAG machine guns due to commonality with Canadian stocks of C6 GPMG, itself a variant of the FN MAG.^[144] Due to the loaned status of the first 20 tanks, the air conditioning unit originally could not be installed as only minimal changes could be made (the crew wore cooling vests instead, and the turret's electric drive generates less heat than the hydraulic drive of the older Leopard C2). The loaned German tanks will be kept by the Canadian Forces and may be further upgraded, while ex-Dutch Leopard 2A6s were modified to German Leopard 2A6M specifications and used as restitution for the loaned tanks.^[145] Canadian Leopard 2s in Afghanistan were later fitted with air conditioning units (a much needed commodity in the scorching desert of Afghanistan) and Saab's Barracuda camouflage mats, which also serve to reduce solar loading by 50 percent.^[103]