The "Timecop Beretta" is the featured weapon used by several characters in the film including Max Walker (Jean Claude Van Damme). In actuality, the Timecop handgun is a Taurus PT99AF housed in a custom shell. The prop would later be used in the TV series Stargate: Atlantis.
High tech pistol with racking foregrip (modified Desert Eagle)
This gun is used by Lyle Atwood (Jason Schombing) as a personal defense weapon when Walker goes back to the 1920's to arrest him. This science fiction (SBR) Short barreled rifle is in reality a modified .44 Magnum Desert Eagle Pistol, but with a larger futuristic shell. At the beginning of the scene, the weapon is represented as some sort of shotgun, with a 'rack' and then it fires large single shots which obliterate furniture, however, by the end of the scene, the weapon is depicted to be a pistol with a racking foregrip. Like the Timecop Beretta, this gun was used on Stargate: Atlantis. The show's armorer, Rob Fournier, specifically said in an interview that it's a .44 Magnum Desert Eagle, and he also mentioned that the gun was originally built for this movie even though it's been re-used on the Stargate shows. -MT2008 The weapons were made by Dlask Arms Corp.
Custom M16A1 rifles
These rifles were used by TEC guards with the firing versions were M16A1 rifles with free floating barrels (and cylindrical shrouds) along with a Bell & Carlson Thumbhole stock.
Modelgun Corp MGC16 Replica Rifle
When not being fired, all TEC guards are seen with MGC Replica M16 Rifles.
Glock 17
The Glock 17 is carried by TEC Internal Affairs agent Sarah Fielding (Gloria Reuben) as well as the local police officers.
Calico M950
The Calico M950 modified with a futuristic housing is used by one of the henchmen that follow McComb (Ron Silver) into the past.
Mossberg 590 Cruiser
A Mossberg 590 Cruiser with a stock, heat shield, pistol grip and synthetic loop foregrip is seen used by one of McComb's henchmen that invade Walker's home in 1994.
Custom Assault Pistol
These very strange looking and angular assault pistols were used in the Civil war sequence. These guns were also used in other shows filmed in Canada, such as Cobra: The Series however they are of an unknown variant. It was assumed at the time of the film that these were imported or Canadian manufactured assault pistols which were unable to be imported into the U.S. as a result of the Assault Weapon Ban of 1994, however, some have opined that these are just dressed up Kimel AP-9 pistols.