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  • Colt M16A4 20 inch Stripped Upper Receiver Assembly
  • Colt M16A4 20 inch Stripped Upper Receiver Assembly
  • Colt AR15A4/M16A4 20 inch Upper Receiver Assembly
  • Colt M16A4 20 inch Stripped Upper Receiver Assembly
  • Colt M16A4 20 inch Stripped Upper Receiver Assembly
  • Colt M16A4 20 inch Stripped Upper Receiver Assembly
  • Colt M16A4 20 inch Stripped Upper Receiver Assembly
  • Colt M16A4 20 inch Stripped Upper Receiver Assembly
  • Colt M16A4 20 inch Stripped Upper Receiver Assembly

    • Colt M16A4 20 inch Stripped Upper Receiver Assembly

    Colt

    Price: $650.00
    SALE: $420.00
    (35 reviews) Write a Review
    SKU:
    M16A4-SUR
    UPC:
    98289035288
    Width:
    5.00 (in)
    Height:
    31.00 (in)
    Depth:
    5.00 (in)
    Caliber:
    .223/5.56
    Barrel Length:
    20"

    Product Description

    The Colt AR15A4/M16A4 Stripped Upper Assembly is used on current issue M16A4 model rifles as well as civilian AR15A4 model rifles. This upper receiver allows for a free-floated barrel and also features a gas-block mounted fixed front sight post with bayonet lug and flat picatinny top. The barrel is Colt's standard 20" chrome lined M16 barrel with an A2 flash hider up front. No BCG included.

    Package Contents

    • Colt M16A4 Barreled Upper Assembly
    • Fixed Post Front Sight

    Specifications

    • 20 Inch 1/7 twist Mil-Spec chrome lined MP tested barrel
    • Unique direct gas operating system eliminates the conventional operating rod and results in fewer and lighter components
    • Accommodates the full range of 5.56mm ammunition, including the NATO M855/SS109 and U.S. M193, utilizing a rifling twist of 1 turn in 7"
    • Straight-line construction disperses recoil straight back to the shoulder, increasing handling capabilities, especially during repeated fire
    • Cartridge case deflector allows easy operation in both right and left handed shooting positions for increased tactical applications
    • Muzzle compensator further reduces muzzle climb and helps eliminate flash and dust signatures
    • Ejection port cover protects the chamber from dust and mud
    • Field strips easily without special tools for simple field user maintenance
    • Flat top receiver allows for removable carrying handle and easy mounting of accessories
    • High strength materials for greater comfort and effectiveness
    • Caliber - 5.56mm
    • Gas Direct system, Locking bolt
    • Front Sight - Adjustable front
    • Flash Hider

    Product Videos

    Custom Field

    Caliber .223/5.56
    Barrel Length 20"

    Product Reviews

    Write a Review

    35 Reviews Hide Reviews Show Reviews

    • 5
      M16a4 upper

      Posted by Jared Casorio on 26th Jul 2020

      An excellent upper! No scratches or handling marks was beyond excellent shape. Fit nice and snuggly to my lower with 0 wobble

    • 5
      20" Colt Upper Assembly

      Posted by Bill Determan on 22nd Jul 2020

      I can't believe these came back in stock. I bought one to switch out with my 20" HBar upper assembly. All I had to do was switch out the BCG and charging handle (no problems there). Made my gun alot lighter, and looks awesome. Thanks.

    • 5
      Great upper

      Posted by Chris Winton on 22nd Jul 2020

      Quick and fair priced

    • 5
      Better than expected.

      Posted by Daniel on 21st Jul 2020

      Excellent price, more than reasonable considering the current situation and lack of choices, with the typical Colt quality. I encourage others to consider this company for their purchases.

    • 5
      Best prices on genuine COLT products

      Posted by Sy on 21st Jul 2020

      Hard to to beat Arms Unlimited Fast free shipping over $99 and competitive pricing on all major brands!!!!

    • 5
      M4 Colt upper

      Posted by Adam Smith on 20th Jul 2020

      I got this upper and it was nothing short of what I expected: great quality, competitive price, and expedited shipping on time. I would definitely recommend Armsunlimited without a doubt.

    • 5
      Colt 20” upper

      Posted by Michael Conway on 20th Jul 2020

      This was my second purchase from Arms Unlimited and I couldn’t be happier. The upper was just what I wanted, site easy to use, and shipped as stated. Can’t wait for my next find at Arms Unlimited.

    • 5
      Excellent Price.

      Posted by Shawn Peck on 20th Jul 2020

      High quality factory new colt uppers are difficult to locate.

    • 5
      Great accuracy

      Posted by Paul on 20th Jul 2020

      Sub 2” groupings. Great all around. Very happy.

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