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

$1,099.00 $999.00
(185 reviews)
Current Stock:
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ALL Semi-Auto Colt Rifle Receivers will be marked "Carbine" as of Q4 2020

Designed specifically for lightweight mobility, speed of target acquisition, and potent firepower capability - the Colt Law Enforcement Carbine delivers.

This specially designed law enforcement weapon system features many of the combat proven advantages of the military Colt M4. With the 4-position buttstock fully retracted, the Colt Law Enforcement Carbine is less than 32in length and weighs only 6.9 lb - ideal for tactical deployment and traditional patrol. Colt's Law Enforcement Carbine is available with a step-cut barrel that allows it to accept a grenade launcher for non-lethal options. Furthermore, the handguard has dual aluminum shielding for more effective heat protection. 6920 comes equipped with a Magpul MBUS backup sight.


  • CALIBER: 5.56x45 NATO (.223 Rem.)
  • WEIGHT: 6.95 lbs (3.15 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. (36.8 cm)
  • RIFLING: 1/7 RH
  • Includes one (1) 30rd magazine


  • 5
    Colt M4 Carbine

    Posted by Thomas J Gotliboski on 14th Feb 2024

    This was the first time that I have ever ordered a weapon of any type online; I am very happy to say it actually went very smoothly with lots of assistance from Arms Unlimited Staff. I am grateful! The weapon is exactly what I wanted! I have cleaned the weapon completely and have ordered a sight for it! Extremely Happy! Thanks

  • 5
    M4 colt

    Posted by Mo on 6th Jul 2022

    Gun in New condition. Emailed customer for questions got a quick response. Excellent customer service. Easy ordering. Will be ordering from them again for other purchases.

  • 5
    Colt AR15

    Posted by Rick Quesnell on 29th Jun 2022

    Excellent service. Rapid delivery of product

  • 5
    Great experience

    Posted by m on 15th Apr 2022

    Shipped fast. C.S was quick when asking questions.

  • 5
    Colt Law Enforcement M4 Carbine

    Posted by Unknown on 7th Feb 2022

    Terrific customer service, communication during every step including tracking delivery process. The gun is great as advertised.... I highly recommend arms unlimited to others and will be back fir future purchases

  • 5
    Colt M4

    Posted by tacmike on 19th Dec 2021

    Arms Unlimited seem to have most of the items in stock whenever we need to order. Always at a fair price.

  • 5

    Posted by MBHSR. on 12th Dec 2021


  • 5
    Great price on this product

    Posted by James Gatto on 1st Sep 2021

    Easy to purchase, easy checkout, quick ship, no shipping or tax, all around good experience

  • 5
    The process went very well

    Posted by Douglas Hamlin on 15th Aug 2021

    After purchasing the Product Colt Law Enforcement M4 Carbine, the transfer to my local gun shop went very well. I was kept in the loop regarding the shipping and arrival. I will be purchasing from Arms Unlimited again in the future.