The T4E Walther PDP Compact 4" is a high-performance training and defensive practice pistol engineered for realistic handling and professional-level force-on-force scenarios. Built around a compact slide with a 4-inch barrel, it offers excellent balance, fast target transitions, and compatibility with existing PDP holsters and duty gear.

Designed as part of the T4E Training for Engagement series, the PDP Compact 4" operates on a 12 g CO₂ system and fires .43 caliber roundballs. It supports a wide range of non-lethal ammunition such as rubber balls, powder rounds, paintballs, and specialized marking projectiles, making it suitable for law-enforcement drills and controlled training environments.

The slide of the PDP Compact is Optics-Ready and accepts micro red-dot sights following the Vortex, C-More, Leupold, and Trijicon footprints when combined with the appropriate adapter plates. Out of the box, the pistol includes open sights with a windage-adjustable rear sight, replicating the aiming characteristics and dimensions of the original Walther PDP.

Additional authentic features include an ambidextrous bolt catch, convertible magazine catch, and an automatic trigger safety. The clearly perceptible blowback cycle, consistent recoil impulse, and ergonomic grip texture combine to deliver realistic feedback during high-stress practice scenarios.

The magazine holds 8 rounds, with a shot capacity of approximately 40 shots per CO₂ capsule. Powered by a single 12 g CO₂ cartridge, the pistol maintains stable velocity with energy output below 5.0 joules. Its Double-Action trigger ensures immediate responsiveness, while the Automatic Trigger Safety contributes to controlled and secure operation.

Measuring 184 mm in length and weighing 690 g, the T4E Walther PDP Compact 4" combines compact size with robust performance, making it suitable for duty-training, simulation exercises, and marker-based practice.