H&K P9S

This particular P9, manufactured in 1976, has a threaded barrel and polygonal rifled bore. The HK P9 was the first pistol to use a variation of H&K’s roller delayed blowback system in a pistol format and polygonal rifling now common in H&K designs. Design began around 1965 and production ran between 1969 and 1978.

Manufacturer: Heckler & Koch
Caliber: 9mm
Barrel: 4.5″