Description
There's a reason the Colt 6920 family has been the benchmark AR-15 for decades. This version, the CR6920MPS-FDE, takes that same battle-proven M4 pattern and hands it over to Magpul for the furniture. You get the MOE SL handguard with M-LOK slots, MOE SL collapsible stock, SL pistol grip with that grippy TSP texture, and a vertical grip up front, all in Flat Dark Earth over a matte black barrel and receiver set. It's a sharp looking two-tone setup, and more importantly, it saves you from buying and swapping parts yourself.
What Makes This Colt M4 Carbine Worth It
Under the furniture is where Colt earns its reputation. The 16.1 inch chrome-lined barrel runs a 1:7 twist, which stabilizes everything from light 55 grain plinking ammo up to heavy 77 grain match loads, so you're not boxed into one bullet weight. Receivers are forged 7075-T6 aluminum, the gas system is direct impingement carbine length, and the whole rifle comes in around 6.9 pounds. It carries easy, points fast, and holds up to high round counts the way a Colt should.
Sights, Controls, and Everyday Handling on the Magpul SL FDE
The fixed A2 front sight post pairs with a Magpul MBUS Gen 2 flip-up rear, so you have a working sight setup the moment you leave the shop. The flat top upper leaves plenty of rail space if you'd rather run a red dot or low power scope, and the M-LOK handguard takes lights and accessories without adding bulk. The six-position stock adjusts from about 32 to 35.5 inches overall, which makes it easy to fit different arm lengths or bulky winter layers.
A Colt AR-15 That Skips the Upgrade Phase
Most folks who buy a base carbine end up spending on furniture, backup sights, and a better grip within the first year. This one shows up with all of that handled, backed by the name that set the standard for the platform. Feed it quality ammo, keep it lubed, and it will run for a very long time.
Key Specifications
- Manufacturer: Colt
- Model: M4 Carbine Magpul SL (CR6920 MPS)
- MPN: CR6920MPS-FDE
- UPC: 098289023698
- Caliber: .223 Rem / 5.56 NATO
- Action: Gas-Operated Semi-Auto (Direct Impingement)
- Barrel Length: 16.1 in, Chrome-Lined
- Twist Rate: 1:7
- Receiver: Forged 7075-T6 Aluminum, Flat Top Upper
- Furniture: Magpul MOE SL, Flat Dark Earth
- Sights: A2 Front, Magpul MBUS Gen 2 Flip-Up Rear
- Muzzle Device: A2-Style Flash Hider
- Capacity: 30+1
- Overall Length: 32 to 35.5 in (Collapsible Stock)
- Weight: 6.9 lbs
- Finish: Matte Black Barrel and Receiver, FDE Polymer Furniture
What’s Included
- Colt M4 Carbine Magpul SL FDE rifle
- 1 x 30-round Magpul PMAG magazine
- Magpul MOE SL stock, handguard, pistol grip, and vertical grip (installed)
- Magpul MBUS Gen 2 flip-up rear sight (installed)
- Owner's manual
Frequently Asked Questions
Can the Colt M4 Carbine Magpul SL shoot both .223 Remington and 5.56 NATO?
Yes. This carbine has a 5.56 NATO chamber, which safely handles both full-pressure 5.56 NATO and .223 Remington ammunition. That flexibility is handy since .223 is often cheaper for range days while 5.56 is a common choice for defensive loads.
What bullet weights work best with the 1:7 twist barrel?
The 1:7 twist is on the faster end, which means it stabilizes heavier bullets like 69 and 77 grain match loads very well. It still shoots common 55 and 62 grain ammo just fine, so in practice you can run nearly anything on the shelf. That versatility is one of the big draws of this barrel.
Do I need to buy sights or furniture for this rifle?
No, it's set up out of the box. You get a fixed A2 front sight, a Magpul MBUS Gen 2 flip-up rear, and full Magpul MOE SL furniture including the stock, handguard, pistol grip, and a vertical grip. The flat top upper and M-LOK handguard give you room to add an optic or light later if you want.
How does this compare to a standard Colt 6920?
Mechanically it's the same trusted 6920 platform, with the chrome-lined 16.1 inch barrel, forged 7075-T6 receivers, and carbine gas system Colt is known for. The difference is the factory-installed Magpul MOE SL package in Flat Dark Earth, which replaces the basic furniture and adds a better rear sight and vertical grip. It's basically the upgraded version without the parts-swapping.






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