I'm translating the operating instructions for a signalling gun, and on the cover it reads "Calibre 9 mm P.A.K.". Any help? I'm stumped by the P.A.K. thing. It is an Umarex Browning Mod. GPDA9 gun.
Erklärung: "PAK is derived from the normal '9mm PA' sometimes used to indicate 9mm Parabellum with the addition of the the K to indicate Knall, which as students of German will know means 'bang' and denotes that it is a blank calibre"
this is a response in the webpage that I put as reference. It is a very thorough explanation, in my opinion.
Erklärung: "PAK is derived from the normal '9mm PA' sometimes used to indicate 9mm Parabellum with the addition of the the K to indicate Knall, which as students of German will know means 'bang' and denotes that it is a blank calibre"
this is a response in the webpage that I put as reference. It is a very thorough explanation, in my opinion.
The translation workplace 
Zustimmung (Netto): +4