Colt Canada MRR
Colt Canada Corporation · Carbine · In Production · 2015
Also known as: Modular Rail Rifle, Colt Canada Modular Railed Rifle
Overview
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.
Specifications
| Weight (empty) | 2900 g (102.3 oz) |
| Barrel Length | 295 mm (11.61") |
| Action Type | Gas Operated |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Action |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 880 m/s (2887 fps) |
| Effective Range | 500 m (547 yd) |
| Barrel Rifling | Right Hand |
| Rifling Twist | 178 mm (7.01") |
| Number of Grooves | 6 |
| Frame Material | Aluminum |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Anodized |
Calibers
- 5.56x45mm NATO · primary · 5.56mm NATO — also known as 5.56 NATO, 5.56x45mm, .223 Remington (chamber compatible)
Features
- Firing modes: Semi Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety, Thumb Safety
- Features: Monolithic Upper Receiver, Free Floating Barrel, Cold Hammer Forged Barrel, Chrome Lined Barrel, M Lok Handguard, Modular Barrel Length, Ambidextrous Controls, Accessory Rail
Service history
Operators
- Canadian Armed Forces
Production
Production years: 2015-present
Produced at the Colt Canada facility in Kitchener, Ontario; also offered through distributors such as Rampart Corp.
Origin
Country of origin: Canada
Designer: Colt Canada Corporation
Notes
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.
Background
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.