Barrel length question

Rick, The standard Army issue PO8 has a 9x100mm barrel, the Navy PO4 is 9x150 and the "Artillery" LPO8 is 9x200mm. Most 20 commericals, made under Versailles Tready restrictions have 7.65x95 or 98mm barrels, although both Stoeger, on the east coast, and Pacific Arms on the west, would install longer barrels from 4" to 22" (in 2" increments) in either 7.65 or 9mm to a customer's specifications. TWH