Colt Monolithic M4 Carbine 5.56mm Semi-Auto Rifle | 16" Barrel

$1,499.00 $1,350.00
(8 reviews)
Current Stock:
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ALL Semi-Auto Colt Rifle Receivers are simply marked "Carbine" as of Q4 2020


The advantage of the Colt 6940 is unmatched. The 6940 displays fresh ingenuity with Mil-Spec hammer and trigger pivot pins, a Magpul MBUS backup sight and a folding front sight for enhanced optical solutions, and a straight gas tube and a removable lower rail which provides modularity for under mounting accessories. The patented one-piece monolithic upper receiver incorporates a continuous Mil-Spec rail from the rear of the upper receiver to the front sight. This feature affords unmatched repeatability for mounting optical systems, not found with separate handguard rail systems. Designed with accuracy in mind, its true free-floating barrel provides the enhanced accuracy necessary for long-range acquisition capability.


  • CALIBER: 5.56x45 NATO (.223 Rem.)
  • WEIGHT: 6.79 lbs (3.07 kg)
  • OVERALL LENGTH (STOCK RETRACTED): 32 in. (81.28 cm)
  • OVERALL LENGTH (STOCK EXTENDED): 35.5 in. (90.17 cm)
  • BARREL LENGTH: 16.1 in. (40.89 cm)
  • RIFLING: 1/7 RH


  • 5
    Colt 6940

    Posted by Christopher Clark on 27th Aug 2022

    The folks here at arms unlimited are top notch. I picked a terrible FFL who couldn't keep track of anything but the customer support folks worked with me to ensure the rifle arrived quickly. I'll never use that FFL again but I will definitely shop with the folks at arms unlimited.

  • 5
    Exactly what I wanted

    Posted by Paul Moody on 13th Jul 2022

    A perfect Colt M4....exactly what I needed.

  • 5
    Great rifle

    Posted by Shawn on 16th May 2022

    Great rifle, fast shipping and no issues with the purchase.

  • 5

    Posted by Chris Padilla on 13th May 2022

    6940 came as expected. Firearm was perfect. Shipping was fast as usual.

  • 5
    M4 carbine

    Posted by Frank Yardley on 17th Feb 2021

    Ordered a colt m4 and got a good price. I ordered online and had my fll send the info to have it delivered. For some reason the email did not go through so they canceled my order. I was not happy because it was out of stock now. I called them and told them what happened and they said no problem and took care of everything. I have no complaints! Great costumer service and they don't waste time. I'll be ordering Ore from them.

  • 5
    New purchase. Very easy purchase.

    Posted by George McKinnon on 16th Feb 2021

    Arrived on time and no damage

  • 5
    Work Rifle Purchase

    Posted by Matthew White on 15th Feb 2021

    Excellent experience. Could not have gone better or easier.

  • 5
    Colt M4

    Posted by Matthew Mora on 15th Feb 2021

    Quality product. The Clot M4 is a reliable rifle. Armsunlimited shipped the product quickly. The only delay was on part of UPS. I recommend paying the extra money and using FEDEX.