What does the PB on a beretta pistol indicate?

How can you find out the value of a 32 caliber revolver called The American double action? Are Smith and Wesson model 27 and model 27 2 the same? What is the manufacture date for springfield 1911 model px9109l with serial number n501098? Can you own an shotgun less than 26 inches? How old is a 50a marked sun king stove and range made in sheffield al? What is the value of an Ithaca 20 gauge Double barrel Flues Model grade one and one half serial number 244XXX? What is a british edenfield.303 No4 Mk2 model in good condition worth serial? Who uses the glock 21? What is the value of an American gun co double barrel 28 gauge? What is the value of a Smith Corona clipper? What is value of a Browning a5 1951 shot gun with engraving with initals PV? Can you bring shotgun shells through customs? How do you make a gun at home? Where can you get a deer barrel for a franchi shotgun? What is difference between browning a5 light and a5 standard weight? What is the value of a Winchester model 37 16 gauge shotgun? Glenfeild mod 30 serial? When did Smith and Wesson stop pinning the barrels on their model 26? Can you dryfire a smith n Wesson 9mm gun? What is a sig sauer 38H worth?

What does the PB on a beretta pistol indicate?