| Actor | Character | Firearm | Notes |
|---|---|---|---|
| David Keith | Det. Lt. Loach | Colt Police Positive | 4" barrel |
| Harvey Keitel | Jake Berman | Smith & Wesson Model 36 | - |
| Jack Nicholson | J.J. "Jake" Gittes | Smith & Wesson Model 36 | - |
| Jack Nicholson | J.J. "Jake" Gittes | Colt Police Positive | 4" barrel |
| Jack Nicholson | J.J. "Jake" Gittes | Mk 2 Hand Grenade | - |
| Rubén Blades | Michael "Mickey Nice" Weisskopf | Colt Model 1903/1908 | Nickel-plated |