The PYa is a high-capacity, double-action, short-recoil semi-automatic pistol. Barrel/slide locking is a simplified Colt–Browning design, similar to that found in many modern pistols (for example the SIG Sauer and Glock families of pistols); the breech end of the barrel is rectangular in shape, rather than rounded, and fits into matching locking grooves within the slide, near the ejection port. The slide stop lever can be mounted on either side of the weapon to accommodate both left- and right-handed users. Likewise, the manual safety is ambidextrous, with safety catches on both sides of the weapon, where it is manipulated by the thumb. It is mounted on the frame, below the rear slide grooves, and directly behind the slide stop lever. The hammer is partially concealed at the sides to prevent catching on clothes and equipment. The magazine release catch is located in the base of the trigger guard on the left side, where it can be manipulated with the thumb (right-handed users) or index or middle finger (left-handed users). The front sight is formed as a fixed part of the slide and is non-adjustable. The back sight is drift adjustable for windage (dovetail type), but this requires a tool. Both feature white contrast elements to ease aiming in low-light conditions. The standard magazine capacity is 17 rounds, fed from a double-column, two position feed magazine. Magazines with an 18-round capacity were produced after 2004.