From what i understand, they are made with Lothar-Walther barrels.
http://www.sar-shop.de/epages/61028398.sf/de_DE/?ObjectPath=/Shops/61028398/Products/98.637
http://www.sar-shop.de/epages/61028398.sf/de_DE/?ObjectPath=/Shops/61028398/Products/98.637




















































