Calico M950
Calico Light Weapons Systems · Personal Defense Weapon · Out Of Production · 1989
Also known as: Calico 9mm pistol, Calico Liberty 50/100
Overview
The Calico M950 is an American semi-automatic personal defense weapon introduced in June 1989 by Calico Light Weapons Systems. Designed by Mike Miller and Warren Stockton, it chambers 9×19mm Parabellum and operates on a roller-delayed blowback action borrowed conceptually from the H&K MP5. Its defining feature is a top-mounted helical (spiral) drum magazine holding 50 or 100 rounds, paired with downward brass ejection - giving it a futuristic profile that made it a staple of 1980s/90s sci-fi cinema. With a 6-inch barrel, ~1 kg empty weight, and ~360 mm overall length, it straddles the pistol/PDW category. Production was always limited; the platform was briefly revived in the 2000s as the 'Liberty' series before parent company CLWS ceased operations in 2024.
Specifications
| Weight (empty) | 1021 g (36.0 oz) |
| Overall Length | 360 mm (14.17") |
| Barrel Length | 152 mm (5.98") |
| Action Type | Roller Delayed Blowback |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Action |
| Magazine Capacity | 50 rounds |
| Magazine Type | Drum |
| Muzzle Velocity | 395 m/s (1296 fps) |
| Muzzle Energy | 580 J (428 ft·lbf) |
| Effective Range | 75 m (82 yd) |
| Maximum Range | 275 m (301 yd) |
| Barrel Rifling | Right Hand |
| Frame Material | Aluminum |
| Slide Material | Steel |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Matte Black |
Calibers
- 9x19mm Parabellum · primary · 9mm NATO — also known as 9mm Luger
Features
- Firing modes: Semi Automatic
- Feed systems: 50 Round Helical Drum, 100 Round Helical Drum
- Safety mechanisms: Manual Safety
- Features: Overhead Helical Magazine, Top Mounted Feed, Downward Brass Ejection, Ambidextrous Controls, Picatinny Optic Rail Later Production, Suppressor Compatible, Carbine Conversion Kit Compatible
Variants
- Calico M900 carbine — 16in Carbine
- Calico M951 — Select Fire Le Smg
- Calico M-960 — Rare Select Fire Pistol
- Calico M-100/M-105 — 22lr Helical
- Liberty 50 — Post Awb Reissue
- Liberty 100 — Post Awb Reissue
Service history
Operators
- Civilian sport shooters and collectors · adopted 1989 · as M950
Production
Production years: 1989-2024 (intermittent)
Estimated low tens of thousands across all variants. CLWS dissolved 2024.
Origin
Country of origin: United States
Designer: Mike Miller, Warren Stockton
Discontinued: 2024
Notes
Helical magazine requires manual pre-winding (~10 turns for 50-rd, ~23 turns for 100-rd) before firing. 1994 Assault Weapons Ban effectively killed civilian helical-mag sales for a decade. Source variance on weight: Wikipedia 2.25 lb (1021 g) is the canonical bare weight; spec sheets sometimes list ~1200 g loaded.
Background
Cartridges spiral around an Archimedes-style central screw inside the drum, advancing one position per shot. Combined with downward brass ejection and overhead magazine position, it produces a silhouette unlike any other firearm - which is exactly why it became a fixture of late-1980s/early-1990s sci-fi cinema, including Total Recall (1990), RoboCop 2 (1990), Bad Boys (1995), and Blade (1998).