Heckler & Koch / Swedish Army

The AK4D is a Swedish‑manufactured, designated‑marksman variant of the AK4 family, itself a licensed copy of the Belgian FN FNC. Developed for the Swedish Armed Forces, the AK4D combines the proven gas‑piston, rotating‑bolt system of the original assault rifle with a longer 508 mm (20 in) barrel, a side‑folding stock, and a built‑in bipod, optimizing it for precision fire at extended ranges (600–800 m). Intended primarily for military use as a squad designated‑marksman rifle, the AK4D features a free‑floating barrel, enhanced trigger pull, and provision for optical sights such as the Hensoldt 4×24 telescopic sight. Its reputation in the firearms community rests on reliability, cold‑weather performance, and ease of maintenance, while its modularity allows quick conversion back to a standard AK4 configuration. Unique characteristics include the integrated bipod, a longer sight radius, and a specially milled gas block that reduces recoil impulse, making it a distinct bridge between standard assault rifles and dedicated sniper platforms.