Otis Driftwood (Bill Moseley) uses a Colt M1911A1 to kill Deputy Naish (Walton Goggins) and Denises father.
Colt Diamondback
Killer Karl (Chad Bannon) one of the two robbers in the opening scene uses a Colt Diamondback to attempt to rob Captain Spaulding (Sid Haig).
Colt Lawman MK III
Captain Spaulding (Sid Haig) pulls a Colt Lawman MK III revolver from under his counter to take out the two robbers
Ruger Redhawk
The second robber Richard Wick (David Reynolds) carries a Ruger Redhawk Revolver.
Sawn-Off Single Barrel Shotgun
During one of the random intermission scenes, a man known as Lewis Dover is wielding a Sawn-off single barrel shotgun, it is more than likely an H&R or New England Model shotgun.
Colt Trooper
Lt. Wydell (Tom Towles), Deputy Naish (Walton Goggins), and Mama Firefly (Karen Black) all carry Colt Trooper Revolvers. Mama Firefly notably uses one to execute Lt. Wydell.
Smith and Wesson Model 36 "Chief's Special"
In a continuity error, Mama Fireflys Colt Trooper becomes a Model 36 "Chief's Special" when she shoots Wydell.
Winchester Model 1300
Rufus uses a Winchester Model 1300 Shotgun to shoot out the teenagers tire on their car