1/48 PZL P.11C MG barrels, gunsight & venturi tube

Master (PL) - 1/48 Pzl P.11c details set wz. 33 machine gun barrels, gunsight and Venturi Tube (for Arma Hobby kits)
The ones available in 1:48 models are too small and duplicate the error from the modeling plans suggested by the original P-11c in the museum in Krakow, equipped with a sight replacement with too small diameter, which is documented by photos from the era.