A disconnector ensures the pistol fires in semi-automatic mode only. The spring-loaded external claw extractor is mounted in the slide, while the fixed ejector is inside the pistol's frame. The BDA is secured against unintentional firing with an automatic firing pin safety which blocks the firing pin and is released only when the trigger is pulled to fire. Immediately after a round is fired, the safety reengages itself even if the trigger is not released. The BDA also has a decocking safety that safely releases and captures the hammer in a safety notch. A decocking lever is mounted on each side of the pistol's frame. Compared to original Browning Hi-Power, one its most notable changes is the shortening of the hammer spur, which would tend to cut into the web between the thumb and fingers of the grip hand if an original Hi-Power was held incautiously. The HP-DA feeds from a dual-column box magazine with a 14-round cartridge capacity. (The FN HP-DA however uses a different 10- or 15-round magazine which is interchangeable with the Browning BDM but will not fit in a Browning BDA-9 though the guns look identical and they are both made by FN Herstal.) The magazine release button, located aft of the trigger, can be configured for either right- or left-hand users simply by swapping out the push-button. The BDA is fitted with a slide catch that holds the slide open after depleting the magazine. The slide can be released by pressing the slide release lever, placed on the left side of the frame. The pistol is aimed using fixed iron sights with contrasting dots – a front blade and dovetailed rear notch. As an option, tritium-illuminated Meprolight night sights can also be fitted. The HP-DA is chambered in the 9×19mm Parabellum cartridge, but a 9×21mm version is also available for those countries where military calibers (such as the 9×19mm) are prohibited for civilian use. Variants Originally, the BDA/HP-DA was produced only as a standard model during its first version in 1983–1987. When the second/updated version was introduced in 1990, FN also introduced new variants of the BDA/HP-DA pistol. The Browning Hi-Power BDA/FN HP-DA was produced in following variants: BDA/HP-DA (initially designated BDA-9S) was the standard model that was also the largest in size. The gun measured 200 × 38 × 130 mm with a barrel length of 118 mm and a weight of 920 grams.