Colt CR6940 / LE6940 Monolithic Carbine
Colt monolithic-upper carbine with a one-piece 7075-T6 upper receiver, continuous integral top Picatinny rail, 16.1-inch chrome-lined M4-profile barrel, folding front sight, and direct-gas operating system.
- Price
- $1,399
- Weight
- 7 lb 1 oz
- Calibers
- 5.56x45mm, .223 Rem
- Rail
- picatinny
Capability Profile
0-10 Scale Across 8 Axes
Key Highlights
- •Colt monolithic one-piece upper with continuous top rail from receiver to gas block
- •16.1" chrome-lined M4-profile barrel, 1:7 twist, 1/2x28 threads
- •Integral folding front sight on the monolithic rail
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Colt Mfg CR6940 Mono Carbine 5.56x45mm NATO 30+1 16.10\" Matte Black Rec/Barrel Black M4 Style Stock Black Polymer Grip Right Hand
Colt M4 Monolithic .223 Rem/5.56 Semi-Automatic AR-15 Rifle, Blk - CR6940
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Overview
The Colt CR6940 / LE6940 Monolithic Carbine is Colt's monolithic-upper AR carbine. Its defining feature is a one-piece 7075-T6 aluminum upper receiver that machines the flat-top and the free-floating handguard into a single part, so the top Picatinny rail runs unbroken from the charging handle to the gas block. That continuous rail holds zero across optic removal and reinstallation better than a two-piece flat-top-plus-handguard setup, and it keeps backup irons, magnifiers, and night vision devices on the same plane with no rail gap at the receiver joint. The gas system is direct impingement; the piston-driven version is the separate LE6940P.
Key Features
- One-piece 7075-T6 monolithic upper receiver with integral free-float handguard
- Continuous MIL-STD-1913 top rail from receiver to gas block
- 16.1" chrome-lined M4-profile barrel, 1:7 twist, 1/2x28 threads
- Carbine-length direct impingement gas system (LE6940P is the piston variant)
- Folding front sight integrated into the gas block
- A2 birdcage flash hider, four-position collapsible stock, A2 grip
- 30-round STANAG magazine compatibility
Pros
- +Monolithic one-piece upper keeps the top rail true to bore and holds optic zero across removal
- +Continuous rail co-planes optics, magnifiers, backup irons, and IR lasers with no receiver gap
- +Chrome-lined 16.1" M4-profile barrel with 1:7 twist stabilizes 55 to 77 grain 5.56
- +Integral folding front sight ships usable and stows flat under an optic
- +Threaded 1/2x28 muzzle accepts standard 5.56 muzzle devices and suppressor mounts
- +Full-length side and bottom rails mount lights and lasers directly
Cons
- −Heavier at about 7 lbs than modern free-float M-LOK carbines like the BCM RECCE-16
- −Quad-rail monolith needs rail covers and is not as slim or light as an M-LOK forend
- −Proprietary one-piece upper is not a host for aftermarket free-float handguards
- −Mil-spec single-stage trigger breaks heavy, near 7 lbs from the factory
- −Collapsible stock can exhibit some wobble on the buffer tube
- −Legacy design with limited new-production availability versus current M-LOK carbines
Detailed Specifications
- caliber
- 5.56 NATO / .223 Rem
- Barrel Length
- 16.1 inches
- Overall Length
- 32 inches collapsed, 35.25 inches extended
- weight
- About 7 lbs unloaded
- operatingSystem
- Direct gas impingement
- barrel
- Chrome-moly, chrome-lined, M4 profile
- Twist Rate
- 1:7 right-hand, 6 grooves
- Muzzle Device
- A2 birdcage flash hider, 1/2x28
- upperReceiver
- One-piece 7075-T6 monolithic upper with integral rail
- sights
- Integral folding front sight, flip-up rear
- stock
- Four-position collapsible
- magazineCapacity
- 30+1
- sku
- CR6940
- upc
- 098289023568
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