Mrs. Peenman (Nancy Fish) uses a Mossberg 500 shotgun to shoot at Stanley Ipkiss (Jim Carrey) when he first puts on the Mask and reaks havoc in her apartment. Lt. Mitch Kellaway (Peter Riegert) tells Ipkiss that she fired a couple of rounds of "20-ought-buck", which makes no sense whatsoever to us who actually know something about guns.
When a group of street thugs attempt to rob Stanley Ipkiss (Jim Carrey) while he is wearing the Mask, he makes several balloon animals to humor their stupidity before building his "personal favorite", an M1928 Thompson.
Freeze (Reginald E. Cathey) is seen armed with a Glock 19 during the failed bank robbery. Several of Niko's (Orestes Matacena) thugs during the shootout in the Coca Bongo club are also seen with G19s, one of which has a chrome slide.
Dorian Tyrell's (Peter Greene) sidearm in the film is a Star Firestar M-43 9mm with a nickel finish, which he uses to shoot at Ipkiss/Mask (Jim Carrey) in the Coco Bongo club.
Niko (Orestes Matacena) draws a chrome Jericho 941 to defend himself during the shootout in the Coco Bongo club. Since Dorian (Peter Greene) is wearing the Mask, he allows Niko to shoot him several times, which has no effect on him. He then sucks up the bullets and fires them out of his mouth, killing Niko.
Using the power of the Mask, Dorian Tyrell (Peter Greene) allows Niko (Orestes Matacena) to shoot him several times (which he shrugs off) and then sucks up the bullets and fires them from his mouth. Since his mouth isn't actually a firearm, this was added to mainly reveal some goofs present (even though firing bullets from your mouth could be considered a goof...).
Error creating thumbnail: File missingEven though he was shot by several bullet heads, he manages to have entire bullets (shell casings and heads) in his mouth.Error creating thumbnail: File missingDorian fires the bullets from his mouth, where the muzzle flashes are obviously CGI. Another goof present is that he fires more bullets from his mouth than Niko fired into him.
When Niko (Orestes Matacena) plays golf off of Dorian Tyrell's (Peter Greene) mouth, one of his henchmen forces him to stay still by holding a customized Colt MK IV Series 70 (which can be noted by its stamp on the slide) on him. The gun's features include target sights, a commander hammer, ornate grips, and a beavertail grip safety spur.
Some of the Edge City Police officers use Smith & Wesson Model 10 Heavy Barrel revolvers. When Stanley Ipkiss (Jim Carrey) escapes from jail, he steals an officer's Model 10HB and uses it to force Lt. Mitch Kellaway (Peter Riegert) to take him to the Coco Bongo club, where he is later disarmed of it by Orlando (Nils Allen Stewart).
When Ipkiss/Mask (Jim Carrey) imitates a cowboy while under fire from Dorian (Peter Greene) and Orlando (Nils Allen Stewart) in the Coco Bongo club, he is seen with a pair of nickel Single Action Army revolvers, one of which is shot from his hand.
