The most prominent weapon in the film, the Spectre M4 SMG is carried by Valkenvania Police Chief Constable Dennis Valkenheiser (John Candy), and used by Constable 'Miss Purdah' (Valri Bromfield). The Spectres in this film have the foregrips and folding-stocks removed.
CAR-15
The main weapon carried by Miss Purdah for most of the film is a CAR-15 rifle.
Dual Smith & Wesson 659s
What appears best to be dual Smith & Wesson Model 659 pistols are carried by Miss Purdah in reverse-draw holsters - Best seen in the larger shot of when she aims her CAR-15 alongside her vehicle.
Currently being debated in the 'Talk' page.
Colt Python Snub-Nose
During a stop, Arthur (Daniel Baldwin) pulls a nickel-plated Colt Python Snub-Nose on Dennis, though it gets quickly knocked out of his hand. It is seen again a bit later on the desk of Judge Alvin Valkenheiser (Dan Aykroyd).
Beretta 92F
As Judge Alvin Valkenheiser examines the confiscated items, including the Colt shown above, a Beretta 92F semi-auto pistol can be seen on the desk.
-- I don't know about you but if I'm still seeing straight, I'd say that ain't no rounded trigger-guard. So it's more likely a 92F. --Werejaws 13:52, 8 March 2010 (UTC)
Bah, you're right - I can't believe I thought that was a rounded-guard.. so silly. I'll fix it up. StanTheMan
XM177E2
Interestingly enough, later in the film, Miss Purdah carries what appears to be an actual XM177E2 rifle. Perhaps standing in for the CAR-15.
Walther PPK
Alvin's personal weapon appears to be a stainless Walther PPK pistol. The PPK pistol in this film appears to have engraving on the slide and white (Possibly Ivory) grips.
Ruger Mini-14
Miss Purdah carries and fires a Ruger Mini-14 rifle with scope and stainless barrel/receiver later on in the film.
Mossberg 500AT
Towards the end of the film, some State Police Troopers carry what appear best to be standard Mossberg 500AT shotguns (wooden furniture), which I figure mainly because of the dual-action bars.
M16A1
National Guardsmen accompanying the State Troopers are armed with M16A1 rifles with 20-round magazines.
Unknown Revolver
An unknown full-sized revolver (My guess would be a Colt) is wielded by a State Trooper.
Unknown Bolt-Action Rifle
Another State Trooper takes position with a scoped bolt-action rifle of unknown Make/Model.