Mk 18 Mod 1 CQBR
Daniel Defense · Carbine · In Production · 2009
Also known as: CQBR, Close Quarters Battle Receiver, Mk18
Overview
The Mk 18 Mod 1 CQBR is a select-fire carbine chambered in 5.56x45mm NATO, produced by Daniel Defense since 2009. Featuring a 30-round magazine capacity, this carbine offers generous firepower for duty use and home defense.
Specifications
| Weight (empty) | 2722 g (96.0 oz) |
| Weight (loaded) | 3292 g (116.1 oz) |
| Overall Length | 679 mm (26.73") |
| Folded Length | 679 mm (26.73") |
| Barrel Length | 262 mm (10.31") |
| Action Type | Gas Operated Direct Impingement |
| Firing Mechanism | Hammer Fired |
| Trigger Type | Single Stage |
| Trigger Pull | 32 N (7.2 lbf) |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 777 m/s (2549 fps) |
| Muzzle Energy | 1210 J (892 ft·lbf) |
| Effective Range | 350 m (383 yd) |
| Maximum Range | 3200 m (3500 yd) |
| Rate of Fire | 800 rpm |
| Barrel Rifling | Right Hand |
| Rifling Twist | 178 mm (7.01") |
| Number of Grooves | 6 |
| Frame Material | Aluminum Alloy |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Hard Anodized |
Calibers
- 5.56x45mm NATO · primary · 5.56x45mm NATO — also known as 5.56mm NATO, 5.56x45mm, .223 Remington
Features
- Firing modes: Semi Automatic, Full Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety Selector, Half Cock Notch
- Features: Collapsible Stock, Select Fire, Accessory Rail, Chrome Lined Barrel, Chrome Lined Chamber, Rotating Bolt, Flat Top Receiver, Picatinny Rail, Ris Ii Handguard, Free Floating Rail, Quick Detach Suppressor
Base model
Service history
Operators
- US Naval Special Warfare Development Group (DEVGRU) · adopted 2009 · as Mk 18 Mod 1
- US Navy SEALs · adopted 2009 · as Mk 18 Mod 1
- US Army Special Forces · adopted 2010 · as Mk 18
- US Marine Corps Special Operations Command (MARSOC) · adopted 2010 · as Mk 18
- British Special Air Service · as Mk 18
Conflicts
- War in Afghanistan (2001-2021)
- Iraq War (2003-2011)
- War on Terror (2001-present)
Production
Production years: 2009-present
Produced by Daniel Defense for US Special Operations Command
Origin
Country of origin: United States
Notes
The Mk 18 Mod 1 addresses shortcomings of the earlier Mk 18 Mod 0, which used the Knights Armament M4 RAS rail system. The RIS II rail system is lighter, stronger, and provides better heat management during sustained fire. The short 10.3-inch barrel reduces muzzle velocity but significantly improves maneuverability in vehicles, buildings, and confined spaces. When used with a suppressor, the weapon achieves an optimal balance of compactness and noise reduction. The Mk 18 platform has become one of the most widely cloned and imitated firearms in the civilian AR-15 market.
Background
The Mk 18 became the weapon of choice for US Navy SEAL Team Six and other tier-one units operating in the dense urban environments of Iraq and Afghanistan. Its compact profile made it ideal for vehicle operations, building clearing, and VIP protection details. The weapon gained legendary status in the special operations community for its reliability and effectiveness in close-quarters combat.