One of the first AR-15s I ever shot was a Colt, so I still get excited to shoot them to this day. As a slightly expanded version of Colt's standard LE6920, I expected the Colt M4 LE Trooper to live up to the same reputation for reliability. 

But, as you know, you can’t base a review on a different gun, no matter how similar they may be. I had to spend some range time with this specific M4 to see if it really is a “Trooper.” 

Table of Contents

First Impressions
Features & Specs
Range Time
Pros & Cons
Final Thoughts 



Colt M4 LE Trooper AR-15 Rifle with ammo
The Amend2 mag, Primary Arms optic and Colt rifle make a heck of a combo. (Photo: Ryan Domke/

Unboxing the Trooper is rather uneventful. The only worthwhile addition you’ll find in the box with the rifle itself is a 30-round PMAG. Picking it up, you’ll instantly notice the basic A2 pistol grip (boo!) and how relatively lightweight it feels. At 6.5 pounds unloaded, it isn’t considered lightweight, but it certainly feels like it. 

Related: Colt M4 Carbine Review – Your Classic AR-15



Colt M4 LE Trooper AR-15 Rifle
M-LOK slots can be found at the 3, 6 and 9 o’clock positions on the Centurion Arms handguard. (Photo: Ryan Domke/

The 16.1-inch barrel features a 1:7 TPI twist rate, making the Trooper ready and able to handle your heavier rounds. That’s not to say that you have to go with heavier ammo, as I ran plenty of standard 55-grain rounds through it with no problems.

Around that barrel, you’ll find a 13-inch Centurion Arms free-floating handguard with plenty of M-LOK slots. There are M-LOK slots at the 3, 6, and 9 o’clock positions and a Picatinny rail up top. It doesn’t come with any sights, but you have plenty of room to mount an optic and your own sights. 

Colt M4 LE Trooper AR-15 Rifle
Note the top Pic rail, but I have to wonder: why no ambidextrous charging handle? (Photo: Ryan Domke/
Colt M4 LE Trooper AR-15 Rifle
At this price point, I’m surprised Colt still went with the A2-style pistol grip and milspec buttstock. (Photo: Ryan Domke/

Aside from the handguard, the rest of the furniture is a bit disappointing. A basic A2 pistol grip and M4 adjustable buttstock come installed from the factory. Thankfully, those are quick and easy to replace, and I would if I were keeping this AR. 

For you trigger snobs out there, the standard Colt trigger probably won’t get you too excited, but it gets the job done. Even if you’re not worried about the trigger itself, a flared trigger guard is definitely suggested, especially if you ever plan to shoot with gloves. 

Colt M4 LE Trooper AR-15 Rifle
Note the minor flare on the magwell, but no flare at all on the trigger guard. (Photo: Ryan Domke/

I don’t like to sound like I’m complaining too much, but when any rifle is over $1,000, I strongly feel it should come with ambidextrous controls and backup sights. That could just be me, though.

Check out the detailed specs below.

  • Caliber: .223 Rem/5.56 NATO
  • Capacity: 30 rounds
  • Barrel Length: 16.1 inches
  • Twist Rate: 1:7 TPI
  • Weight: 6.5 pounds
  • Receiver Material: 7075-T6 aluminum
  • MSRP: $1,149



I decided to run a Primary Arms SLx 1x during my testing phase of the Trooper, which mounted quickly and easily thanks to the Picatinny rail. In addition to shooting at my local indoor range, I finally found some outdoor space to shoot, but unfortunately was limited to 50 yards. At varying distances between 10 and 50 yards, there wasn’t a pop can, 2-liter bottle, or metal gong that was safe! To no surprise, the Trooper paired with the SLx 1x was very accurate, once zeroed. 

Colt M4 LE Trooper AR-15 Rifle with targets
My first shots getting my prism scope dialed in on the left. The immediate next grouping is on the right. Not bad for a quick adjustment. (Photo: Ryan Domke/

From a reliability standpoint, it was smooth sailing. All 240 rounds zoomed downrange without a problem. I shot everything from 55-grain Fiocchi .223 FMJBTs to 62-grain PMC X-TAC green tips, and even some .223 Wolf steel case to make sure the rifle wasn’t picky. Just as I expected, it was not. 

Whether I was shooting slow and methodically or mag dumping, the Trooper proved itself reliable. 



  • Reliable – I had zero failures of any kind
  • Accurate – comes down to the shooter and optic/sights of course, but it worked well for me
  • Ample Picatinny rail space
  • 1:7 TPI twist rate for those heavier loads
  • Lots of M-LOK slots


  • No backup sights
  • Basic grip and stock
  • A tad on the pricey side (for what you get)
  • No ambidextrous controls



Colt M4 LE Trooper AR-15 rifle with ammo
Solid and reliable, the Trooper is a great starting point for your next AR build, as long as the price doesn't turn you off. (Photo: Ryan Domke/

Would I hesitate to pick up a loaded M4 LE Trooper with a horde of zombies coming my way? Nope, I’d grab it quickly and rest easy with its reliability. Do I think a few hundred dollars of upgrades and accessories would make this rifle awesome? Yes. 

That was my longwinded way of saying that I feel the Trooper is a reliable and capable workhorse, but you should expect to spend a decent amount to really make it suit your needs. I know we all would like to see certain guns cheaper, but to consider this a solid value, I truly would like to see this fall closer to the $750 price point as opposed to the $1,050-plus where you’ll find it floating recently.

If you’re in the market for a new no-frills AR-15 and come across one of these Troopers for the right price, I don’t think you’ll have any buyer’s remorse. 

revolver barrel loading graphic