Product Description
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
Product Reviews
33 Reviews Hide Reviews Show Reviews
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Solid
With the current climate and difficulty in finding parts, especially Colt parts, this was a good deal. It seems like the trend is toward shorter barrels now, which is probably why this was priced reasonably. But give me an A4 any day...
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The Real Deal
Not easy to find quality AR uppers right now and a Colt is even harder to find. If you do expect to pay the "Colt" premium, not at Arms Unlimited. They had the best price anywhere and exactly as described. Colt Cage marked, Colt manual, barrel cap and extra pins for ban era Colts. Very happy with purchase.
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Great product as described
100% satisfied with my colt M16A4 upper fits nice and snug on my lower with no movement and the over all build quality is top notch I would recommend this upper to any who is looking to do a m16A4 clone build . I’m also impressed how fast my order was ship during theses times I’am definitely a customer for life
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Colt AR-15 A4 Barrel
Received the product ordered in 3 days. It is exactly what I was looking for. Now I need the A4 lower receiver.
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Perfect Colt A4 Flattop Upper Receiver
What can I say? This is a new came to me as a new in the Colt Quality A4 upper receiver. Shoots great, and I know this will last a lifetime.
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Solid and legit
I was a little wary at first but when I received it in the mail al my worries washed away. This is as close as to how my rifle felt when I was in the service.
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Real Deal and Excellent price!
It's a Colt A4 Upper with Colt cage code and Brass Aluminum Forging Enterprises forge mark (Square). I ditched the Magpul handguards and slapped on a M5 RAS. I bought a Colt charging handle and BCG and still came in cheaper than other brands...which obviously aren't Colt...so it was a no brainer for me.
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M16a4 upper
An excellent upper! No scratches or handling marks was beyond excellent shape. Fit nice and snuggly to my lower with 0 wobble
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20" Colt Upper Assembly
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.
