Joey Brown (Ronald Lacey) is armed with a Smith & Wesson Model 36 with bobbed hammer in "Whatever Lola Wants" (S06E01). In the climactic scene Reggie Betts (Ron Cook) takes Brown's revolver. DCI Barney Crozier (Sean Arnold) holds a snub nose revolver that seems to be a Smith & Wesson Model 36 in "A Man of Sorrows" (S06E06).
Harry Johnson (David Ross) owns a Colt Detective Special revolver in "Private Fight" (S06E07). When Johnson prepares to meet the blackmailer, DS Jim Bergerac (John Nettles) unloads the gun and returns it to the owner.
Pistols
Walther PPK
Ranzen (Dean Harris) carries a Walther PPK in "Whatever Lola Wants" (S06E01). In the climactic scene Tony Betts (Adam French) disables Ranzen and takes his pistol.
Reck Baby
A blank- and gas-firing Reck Baby pistol is used by Lola Betts (Ann Mitchell) in "Whatever Lola Wants" (S06E01). In the final scene the gun is briefly hold by Reggie Betts (Ron Cook).
Submachine Guns
Sa vz. 61 Skorpion
Suppressed Sa vz. 61 Skorpion submachine guns are used by a group of Israeli commandos (Roger Ennals, Jeff Boyd, David Scheel, and Julia Lenardon) in "The Sin of Forgiveness" (S06E05).
Alice Thorwell (Matyelok Gibbs) holds a Double Barreled Shotgun in the final scene in "Retirement Plan" (S06E08).
Other Weapons
Edison Giocattoli Sharkmatic
George Lacey (Nick Stringer) uses a Edison Giocattoli Sharkmatic cap gun in order to threaten Charlie Hungerford in "Private Fight" (S06E07). This toy gun is very realistic, and anyone without proper knowledge would definitely take it for a real weapon, especially when the gun is pointed from a car on high speed.
Remington 31 (Keiheisha KHC Airsoft Replica)
A magazine fed pump action shotgun is seen in George Lacey's (Nick Stringer) car in "Private Fight" (S06E07). This is an KHC airsoft replica of Remington 31, a very rare early version with a fictional box magazine, later removed from subsequent models.
FAS AP 604 Air Pistol
Hitman Reno (Barrie Houghton) uses a FAS AP 604 air pistol with poisoned darts for the assassination in "Retirement Plan" (S06E08). The pistol is fitted with Singlepoint OEG sighting device.
Smoke Grenade
In "Private Fight" (S06E07) Peter Retford (Eric Allan) uses a smoke grenade to blind Johnson's henchman who tried to assault him. It bears resemblance with British L60 series grenades but more likely is a mere mockup.
Trivia
In one scene in "The Sin of Forgiveness" (S06E05) a historical site with a German coastal gun of unclear model is seen.