CZ 805 Bren PS1 Pistol- 10 Round Mag Version The first civilian legal form of the 805 Bren is here – the PS1 pistol, equipped with an 11″ barrel in caliber 5.56 NATO/223. Utilizing the ubiquitous STANAG magazine as used in the AR15/M16, the 805 action is housed in a one-piece aluminum upper receiver with a monolithic Piacatinny rail. At the rear of the action is a multipurpose mounting point, fit from the factory with a single point sling attacment. The addition of the accessory arm brace adapter coupled with the effective factory installed 2 port brake makes the Bren impressively stable to shoot in pistol form. It shares the same low profile sights as the Scorpion – an adjustable apreature rear sight and a post type front sight.