Steel barrel manufactured by ZBROIA rfk — 4.5 mm, 550 mm long — intended for PCP air rifles: Kozak FC-2, Hortitsia, Sapsan, Biathlon.
The rifle barrel is made of gun steel and features 12 left‑hand rifling grooves (turning counter‑clockwise). The rifling twist rate is 450 mm (one full turn in 450 mm).













