Czech Republic. South Moravian Region. Brno. The IDET International Defence and Security Technologies Fair is an important defence and security technology show. It is designed as a pro-export platform for the Czech defence and security industry. A Czech policeman tries a CZ 805 BREN machine gun. The CZ 805 BREN is a gas-operated modular assault rifle designed and manufactured by Česká zbrojovka Uherský Brod. The modular design enables users to change the calibre of the weapon to 5.56×45mm NATO or 7.62×39mm intermediate cartridges by quick change of barrel with gas tubes, breech block, magazine bay and magazine. The CZ 805 BREN is used by various police and military forces, such as the Czech Republic. 6.10.21 © 2021 Didier Ruef