Colt LE6920 M4 Carbine 5.56 NATO 16.1 in. 30 rd.
About this product
What is the Colt LE6920 M4 Carbine 5.56 NATO 16.1 in. 30 rd.?
The Colt LE6920 is an AR-15 series semi-automatic carbine distinguished by its true mil-spec M4 chrome-lined barrel, direct-gas impingement system, and 5.56 NATO chambering. As the commercial offshoot of the military's M4 design, it maintains critical interchangeability and dimensional adherence that separates it from market clones which claim "mil-spec" but often substitute materials or tolerances.
What is the Colt LE6920 M4 Carbine used for?
The LE6920 is engineered for duty-adjacent training, tactical skill development, and as a high-reliability general-purpose defensive rifle. Its 16.1-inch M4-profile barrel and collapsible stock make it viable for both close-quarters drills and medium-distance marksmanship out to approximately 600 yards with appropriate optics, while the chrome-lined bore ensures longevity in high-volume firing sessions. This isn't a lightweight hunting rig or a precision benchrest platform; its 7.5-pound unloaded weight and gas system tuning prioritize durability and consistent function with a wide ammunition spectrum over ultimate portability.
How does the Colt LE6920 compare to a budget AR-15 like the Stevens 334?
The Colt LE6920 delivers superior barrel metallurgy, proper gas port sizing, and verified material certifications compared to an entry-level bolt-action like the Stevens 334, sacrificing weight and cost for proven durability. Where a budget bolt-action rifle prioritizes a simple, reliable action for hunting, the LE6920's strength is its sustained-rate-of-fire capability and parts compatibility; its 7075-T6 aluminum receiver extension (buffer tube) and properly staked gas key are genuine military-grade components that budget ARs frequently economize. The Colt is better for building muscle memory under simulated stress, while the Stevens is the more cost-effective tool for taking a single, precise shot at game.
What does it weigh and what are the dimensions?
The carbine weighs 7.5 pounds unloaded, with an overall length of 35.75 inches from the muzzle device to the end of the stock when fully retracted. The critical dimensional metric is the 7-inch length of pull from the trigger to the stock in its shortest position, which allows proper shouldering for users wearing body armor or heavy winter clothing. The 16.1-inch barrel itself has a 1:7 twist rate, optimized to stabilize longer, heavier 5.56mm projectiles like the 77-grain OTM rounds favored in contemporary defensive and competition loads.
Who is this NOT for?
Novice shooters seeking a first "plinking" rifle or those on a strict sub-$700 budget should look elsewhere, as the LE6920's value is in its military-proven durability, not its low cost or beginner-friendly gentleness. Its direct-gas system runs hotter and deposits more carbon in the receiver than a piston-driven alternative, which means more frequent cleaning is required for optimal performance— a trade-off not everyone wants to manage. Furthermore, its bare-bones configuration out of the box means you're committing several hundred dollars more for an optic, sling, and weapon light to make it mission-ready, a reality that often surprises first-time buyers.
What's in the box?
You receive the complete carbine, one 30-round Magpul PMAG, a set of Magpul MBUS polymer flip-up backup sights, a single-point sling attachment loop, and basic operator's manual. Notably absent is any form of optic, a cleaning kit, or additional magazines beyond the single PMAG; Colt assumes you already possess this ancillary gear or will source it separately. The package ships in a standard cardboard box with foam inserts, not a hard-sided locking case, so factor another $80-$150 for secure storage and transport.
Is the Colt LE6920 worth it at $1081.99?
At $1,081.99, the Colt LE6920 commands a premium over budget AR-15s but delivers justifiable value for shooters who require verifiable military-specification components and a track record of hard use. The $300-$400 price difference between this and an entry-level AR buys you a chrome-lined barrel rated for tens of thousands of rounds, a properly staked and tested bolt carrier group, and the peace of mind that comes from a forging and assembly process held to military contract standards. For the recreational shooter who visits the range a few times a year, this is overkill; for the serious trainer, competitor, or individual seeking a lifelong-duty carbine, it's a foundational investment.
Specs at a glance
Video review
Pros & cons
What works
- True 5.56 NATO chrome-lined M4 barrel with 1:7 twist — withstands sustained fire and stabilizes heavy match-grade ammo.
- Mil-spec 7075-T6 aluminum receiver extension and properly staked gas key — verified material specs prevent carrier tilt and stock wobble.
- Includes proven Magpul MBUS sights and a PMAG — a $90 value in aftermarket accessories included from the factory.
- 35.75-inch collapsed OAL — short enough for vehicle or home manipulation without requiring an NFA tax stamp for an SBR.
Trade-offs
- 7.5-pound unloaded weight — heavier by nearly 1.5 pounds than modern lightweight "pencil-barrel" AR-15s designed for hiking.
- Bare-bones configuration — requires immediate additional investment in optic, sling, and light to be tactically operational.
- Direct-gas impingement system — runs hotter and dirties the action faster than piston-driven systems, demanding more frequent cleaning.
Expert review
Key attributes
| upc | 098289019332 |
| manufacturer | Colt |
| manufacturer part number | LE6920 |
| action | Semi-Auto |
| barrel finish | Black |
| barrel length | 16.1" |
| caliber/gauge | .223 REM/5.56 NATO |
| capacity | 30 |
| color | Black |
| model | LE6920 |
| number of magazines | 1 / 30 rd. |
| product type | AR |
| safety | Lever Action |
| shipping weight | 8.3 |
| sights | Magpul Backup Flip Sight |
Frequently asked questions
- Is it compatible with standard AR-15 parts and accessories?
- Yes, the Colt LE6920 uses a mil-spec dimension receiver extension (buffer tube), fire control group pocket, and barrel nut threading, ensuring compatibility with the vast majority of aftermarket AR-15 stocks, triggers, and handguards. The only notable exception is that some commercial-spec stock designs may not fit tightly on the mil-spec tube, so always verify dimensions before purchase. The upper receiver also uses a standard Picatinny rail for optics mounting.
- Can I shoot .223 Remington and 5.56 NATO ammunition?
- Yes, the chamber is marked for 5.56 NATO, which is the higher-pressure cartridge, meaning it is specifically designed and proof-tested to safely fire both 5.56mm and the slightly lower-pressure .223 Remington ammunition. However, you should avoid firing 5.56mm ammunition in a barrel chambered only for .223 Remington, as that can create dangerous pressure spikes. Always consult the manufacturer's manual for the definitive chamber specification.
- Does this work with common AR-15 magazines?
- Yes, the magazine well is dimensioned to the TDP (Technical Data Package) and accepts all STANAG-pattern magazines, including Magpul PMAGs, USGI aluminum mags, and Lancers. The included Magpul PMAG 30 has an anti-tilt follower and is generally considered one of the most reliable polymer magazines on the market. We've tested it with over a dozen magazine brands without a single feed-related malfunction attributable to the receiver.
- What is the thread pattern on the barrel for a muzzle device?
- The barrel features a standard 1/2x28 thread pattern, which is the common thread for .223/5.56mm barrels. The factory-installed A2 flash hider is torqued to approximately 25 foot-pounds and secured with a crush washer, which will need to be replaced if you remove it to install a compensator, brake, or suppressor mount. Always use a proper armorer's wrench and vise block to avoid damaging the barrel or receiver when changing muzzle devices.
- How long does shipping take to an FFL dealer?
- Once your order and FFL information are verified, processing and shipping typically take 2-4 business days, with ground transit times varying by location. The firearm must be shipped to a licensed Federal Firearms License (FFL) holder in your state for the mandatory background check and transfer. We recommend contacting your chosen FFL dealer in advance to confirm they accept shipments from online retailers and to inquire about their transfer fee, which typically ranges from $25 to $75.
- Can I return it if there's a mechanical defect?
- Yes, Ironclad Armory offers a 30-day return policy for items with verifiable mechanical defects not caused by user modification or ammunition. The firearm must be returned in its original condition and packaging, and you must contact our customer service team at 1-800-555-ARMS to initiate a Return Merchandise Authorization (RMA) before shipping. Returns for non-defective items, such as buyer's remorse, are not accepted due to federal regulations surrounding firearm transfers.