top of the receiver and is capable of accepting a wide variety of additional sighting equipment (red-dot or telescope day sights, night sights, lasers etc.). The weapon is equipped with side-folding buttstock, which is adjustable for length of pull, and can be completely removed if maximum compactness is required. Additional equipment also includes a new, specially designed 40 mm underbarrel grenade launcher and a bayonet. The fire control unit includes a ambidextrous safety/fire selector switch, which permits semi-automatic, 2-round bursts and full automatic fire. The charging handle can also be installed on either side of the weapon, depending on user preferences. The CZ 805 BREN has two barrel lengths. A 360 mm (14.2 inch) barrel length for the standard assault rifle variant, the CZ 805 BREN A1 and a 277 mm (10.9 inch) barrel for the carbine variant, the CZ 805 BREN A2. The barrel is chrome-lined for accuracy and durability. The rifle features a separate detachable magazine housing which can be replaced easily to allow the use of STANAG or HK G36 5.56×45mm NATO magazines. It is also capable of housing a 5.56×45mm NATO 100-round Beta C-Mag. In standard configuration, the CZ 805 BREN uses a 5.56×45mm NATO proprietary 30-round magazine made of transparent polymer made by CZUB. Variants CZ 805 BREN The CZ 805 BREN A1 is the standard assault rifle configuration chambered in 5.56×45mm NATO cartridge with a barrel length of 360 mm (14.2 inch). The CZ 805 BREN A2 is the carbine configuration chambered in 5.56×45mm NATO cartridge with a barrel length of 277 mm (10.9 inch). The CZ 805 BREN S1 is a semi-automatic only variant of the CZ 805 BREN which is intended for the civilian market. It has been discontinued in favour for the CZ BREN 2 Ms, which is a semi-automatic only variant of the CZ BREN 2. CZ 807 The CZ 807 is an assault rifle chambered in 7.62×39mm cartridge and has the ability to quickly change calibre to 5.56×45mm NATO cartridge by replacing the magazine well module and swapping out the barrel. CZ BREN 2 The CZ BREN 2 is a modular assault rifle that improves upon the original CZ 805 BREN design based on the experience of users . The rifle can be chambered in either 5.56×45mm NATO or 7.62×39mm cartridge. Switching the caliber of the rifle can be done by swapping out the barrel and mag well. CZ