Data Quality83%
MASS(Military Archive Scoring System)
ⓘ Regardless of era, the same scoring system applies to all units in the combat shotguns category.
01 / Overview
Colt Defender Mark I
💰 PERFORMANCE / PRICE ASSESSMENT Methodology ↗
COMBAT SHOTGUNS · COLD WAR
17
PERFORMANCE/PRICE
78
UNIT COST (2025 USD)
—
ⓘ Performance/Price and MASS score are computed across all units in the combat shotguns category, regardless of era.
02 / Specs & Design
◎General4MOD.4
- First Production Year1967
- DesignerRobert Hillberg
- Weight (Empty)3.901 kg
- Currently In ServiceNo
◈Cartridge & Calibre4MOD.4
- Cartridge20 gauge 3 inch magnum
- Calibre Classshotgun
- RimfireNo
- Caseless AmmunitionNo
▣Operation6MOD.6
- Action TypeStriker-Fired
- Fire Modessingle-shot
- Select FireNo
- Feed SystemCylinder
- Drum / Belt Capacity8
- Trigger Typedouble-action
◇Barrel & Sights5MOD.5
- Barrel Length304.8 mm
- Sight Typeiron
- Optic RailNo
- Iron SightsYes
- Threaded BarrelNo
◆Construction6MOD.6
- Overall Length450.85 mm
- Receiver Materialaluminum alloy with steel inserts
- Folding / Collapsing StockNo
- Bullpup LayoutNo
- Ambidextrous ControlsNo
- Modularitybarrel selector and tear gas canister options
▤Features5MOD.5
⬢Production & Cost3MOD.3
- Production Start1967
- Production End1971
- Variants4
03 / History
SERVICE LIFESPANRetired
- 1967Production started
- 1971Production ended
59
years in service
4
years in production
0
countries operating
ⓘ 1 countries retired it.
05 / MASS Score
COMBAT SHOTGUNS RANKING Combat Shotguns · Cold War
MASS RANKINGSMASS ↗
53COMBAT SHOTGUNS17COLD WAR · COMBAT SHOTGUNS909UNITED STATES · ALL WEAPONS39PERFORMANCE/PRICE · COMBAT SHOTGUNS
ⓘ Rankings are within theCombat Shotgunscategory.
📖 TERMS ON THIS PAGE3terms
A rotating cylindrical chamber that holds multiple cartridges and aligns each with the barrel for firing, as used in revolver-type pistols.
Adjustable metal aiming devices on firearms, consisting of a front post and rear notch, used without magnification.
Firearm action where the trigger mechanism both cocks and releases the striker or firing pin to discharge the round.
These terms are listed automatically because they appear on this page.full encyclopedia →
📚 Sources