Colt · Carbine
Colt Canada MRR
Gas-operated · 5.56x45mm NATO · introduced 2015
Also known as Modular Rail Rifle, Colt Canada Modular Railed Rifle
About the Colt Canada MRR
The Colt Canada MRR (Modular Rail Rifle) is a semi-automatic, gas-operated AR-15-pattern carbine chambered in 5.56x45mm NATO. Built around a monolithic upper receiver with a continuous top rail and a Magpul M-LOK modular handguard, it accepts interchangeable free-floating cold hammer-forged barrels in lengths from 11.6 to 18.6 inches. Marketed to military, law enforcement, and commercial users, the MRR pairs Colt Canada's chrome-lined barrel technology with optional ambidextrous fire controls and a manual thumb selector.
Colt Canada (formerly Diemaco) is the Canadian small-arms manufacturer behind the C7 and C8 service rifles. The MRR distills decades of that AR-pattern experience into a modular civilian and operational platform that lets users reconfigure barrel length and rail real estate for different roles.
Colt Canada MRR specifications
General
- Type
- Carbine
- Action
- Gas-operated
- Firing mechanism
- Hammer-fired
- Trigger
- Single action
- Calibres
- 5.56x45mm NATO
- Magazine capacity
- 30 rounds
- Magazine
- Detachable box magazine
Dimensions
- Barrel length
- 295 mm (11.6 in)
- Weight (empty)
- 2.90 kg (6.39 lb)
Barrel
- Rifling twist
- 1:7 in (178 mm)
- Rifling
- Right hand
- Grooves
- 6
Materials
- Barrel
- Steel
- Receiver / frame
- Aluminum
- Stock
- Polymer
- Finish
- anodized
Performance
- Muzzle velocity (typical)
- 880 m/s (2887 fps)
- Effective range
- 500 m
History
- Introduced
- 2015
- Production status
- In production
- Country of origin
- CA
- Designer
- Colt Canada Corporation
Features
- Monolithic upper receiver
- Free floating barrel
- Cold hammer forged barrel
- Chrome lined barrel
- M lok handguard
- Modular barrel length
- Ambidextrous controls
- Accessory rail
Safety
- Manual safety
- Thumb safety
The MRR is offered with multiple upper-receiver rail lengths (Sub-Compact, Small, Medium) and in 5.56x45mm, 7.62x51mm and .300 Blackout chamberings. Commercial 5.56 models are typically semi-automatic only; the modular system allows barrel swaps without specialized armorer tools.
Similar models
Aero Precision M4E1
Gas-operated · 5.56x45mm NATO
Colt Canada C20 DMR
Gas operated short stroke piston · 7.62x51mm NATO
Colt Canada C7
Gas-operated (direct impingement) · 5.56x45mm NATO
Colt Canada C7CT
Gas-operated (direct impingement) · 5.56x45mm NATO
Colt Canada C8
Gas-operated (direct impingement) · 5.56x45mm NATO