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Most AR uppers are two parts pretending to be one: a receiver up top and a handguard clamped on with a barrel nut. The Colt M4 Monolithic Carbine skips that whole arrangement. The upper receiver and rail are machined as a single piece, which means the full-length Picatinny rail running from the rear of the receiver out to the front sight stays perfectly true to the bore. Mount a red dot, a magnifier, or night vision anywhere along that rail and it returns to zero the same way every time. That kind of repeatability is the reason this design earned a following with law enforcement agencies before it ever hit the civilian market.
Because the handguard never touches the barrel, the 16.1 inch government profile barrel is genuinely free-floated. No sling tension, no bipod pressure, no grip on the handguard changing your point of impact. The 1:7 twist stabilizes everything from light 55 grain plinking loads up to heavy 77 grain match ammo, and the carbine-length gas system with straight gas tube keeps cycling smooth and consistent. Owners regularly report tight groups once an optic is dialed in, and thousands of rounds without a hiccup.
The lower is classic Colt Mil-Spec, shared with the 6920 family, so parts, stocks, and grips swap over without drama. You get a 4-position collapsible stock, Mil-Spec trigger, and a removable lower rail section for lights or a vertical grip, keeping weight down when you run it slick. A folding front sight sits integrated at the gas block, paired with a Magpul MBUS rear, so you have backup irons out of the box that co-witness cleanly with most red dots. An A2 flash hider on 1/2×28 threads finishes the muzzle.
At roughly 6.8 pounds and 32 to 35 inches overall, this carbine handles like a standard M4 but shoots like something more refined. It feeds from any standard AR-15 magazine and ships with a 30-rounder. If you want a Colt with real duty pedigree and a rail that will not walk, this is the one to grab.
The upper receiver and rail are machined from one piece instead of using a separate handguard and barrel nut. That gives you a continuous top rail that holds zero for optics no matter where you mount them, plus a true free-floated barrel for better accuracy. The lower receiver is the same proven Mil-Spec design shared across Colt's M4 family.
Functionally, yes. The CR6940 is the current production version of the LE6940 that Colt sold to law enforcement agencies for years. Owners who have run both report no real difference in build quality or performance, just updated receiver markings.
It does. There is a folding front sight integrated at the gas block and a Magpul MBUS flip-up rear, so you can shoot it right out of the box. Both fold flat when you add an optic and co-witness with most red dots.
The 1:7 twist barrel handles a wide range of bullet weights, from 55 grain range ammo up to 62 and 77 grain loads. Heavier match bullets tend to shine at distance with this twist rate, but it cycles common brass-cased 5.56 and .223 reliably. It also accepts any standard AR-15 pattern magazine.
| UPC | 098289023568 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | CR6940 |
| Action | |
| ATF Type | MODERN SPORTING RIFLE |
| Barrel Finish | MATTE BLACK |
| Barrel Length | 16.1" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 30 |
| Color | Black |
| Length | 35'' |
| Magazine Included | 1 x 30-Round |
| Model | |
| Number of Magazines | 1 20 rd. |
| Product Type | AR |
| Safety | Safety Selector Switch |
| Shipping Weight | 9.9 |
| Sights | A2 Front, Magpul MBUS Rear |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (OR) | NO SALE TO OREGON |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
| Package Height | 3.1 |
| Package Width | 8.6 |
| Sights Type | Adjustable Sights |
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