10.5" 556 NATO Stainless Barrel - 12" Rail - Slim Cone Flash Can - AR15  Upper Assembly 10.5" 556 NATO Stainless Barrel - 12" Rail - Slim Cone Flash Can - AR15  Upper Assembly 10.5" 556 NATO Stainless Barrel 10.5" 556 NATO Stainless Barrel 10.5" 556 NATO Stainless Barrel
SKU: UA55N10SS08M428C_12ML00_SC
AR15parts.com

10.5" 556 NATO Stainless Barrel - 12" Rail - Slim Cone Flash Can - AR15 Upper Assembly

$450.00
$325.00
(You save $125.00)

10.5" 556 NATO Stainless Steel M4 Barrel AR15 Upper Assembly with 12" Rail and Slim Cone Flash Can

The 556 NATO (5.56x45) chamber will reliably fire both 556/223 with the highest possible accuracy (223 Remington ammo can be used in 556 NATO barrels). Both rounds maintain supersonic speed beyond 500 yards and equal the accuracy of the benchmark M1 Carbine / M2 30-06 Springfield combination.  The 556 NATO cartridge is designed as a lighter alternative to the 7.62x51 NATO that maintains the capability of penetrating 0.135" steel at 500 yards.

Specifications:

  • 10.5" 556 NATO 416R Stainless Steel M4 Contour Barrel with 1x7 Twist and 1/2x28 Threads
  • Mil-Spec Upper Receiver forged from 7075 T6 aluminum with forward assist and dust cover assembly installed. Hard coat anodized MIL-STD 8625 Type 3 Class 2
  • 12" Narrow Profile Free Float Rail machined from 6061 T6 aluminum Very comfortable and very light weight. Your choice of M-LOK or KEYMOD attachment points along the entire length at 3, 6, and 9 positions. Hard coat anodized MIL-STD 8625 Type 3 Class 2
  • 0.750" Low Profile Gas Block
  • Carbine Length Gas System
  • Slim Cone Flash Can with crush washer

This upper assembly will fit all standard AR15 lower receivers.

This item is "Firearm Parts", not a complete firearm (no serialized components). It will be shipped directly to you with no FFL transfer required.

You are responsible for knowing federal, state and local laws applicable to this item. AR15Parts.com reserves the right to not ship to addresses where it may not be legal to own this item.

Full Description
Current Stock: 63
Rail Type *
Muzzle Device *
Magazine
Bolt Carrier Group
Charging Handle
Qty
  • Description

    10.5" 556 NATO Stainless Steel M4 Barrel AR15 Upper Assembly with 12" Rail and Slim Cone Flash Can

    The 556 NATO (5.56x45) chamber will reliably fire both 556/223 with the highest possible accuracy (223 Remington ammo can be used in 556 NATO barrels). Both rounds maintain supersonic speed beyond 500 yards and equal the accuracy of the benchmark M1 Carbine / M2 30-06 Springfield combination.  The 556 NATO cartridge is designed as a lighter alternative to the 7.62x51 NATO that maintains the capability of penetrating 0.135" steel at 500 yards.

    Specifications:

    • 10.5" 556 NATO 416R Stainless Steel M4 Contour Barrel with 1x7 Twist and 1/2x28 Threads
    • Mil-Spec Upper Receiver forged from 7075 T6 aluminum with forward assist and dust cover assembly installed. Hard coat anodized MIL-STD 8625 Type 3 Class 2
    • 12" Narrow Profile Free Float Rail machined from 6061 T6 aluminum Very comfortable and very light weight. Your choice of M-LOK or KEYMOD attachment points along the entire length at 3, 6, and 9 positions. Hard coat anodized MIL-STD 8625 Type 3 Class 2
    • 0.750" Low Profile Gas Block
    • Carbine Length Gas System
    • Slim Cone Flash Can with crush washer

    This upper assembly will fit all standard AR15 lower receivers.

    This item is "Firearm Parts", not a complete firearm (no serialized components). It will be shipped directly to you with no FFL transfer required.

    You are responsible for knowing federal, state and local laws applicable to this item. AR15Parts.com reserves the right to not ship to addresses where it may not be legal to own this item.

  • Reviews

    Reviews

    S. T.

    Ran Flawlessly

    Bought this upper for a pistol build. Got about 300 rounds through it without a single issue. Cycles perfectly and ejects brass straight out at the three o'clock position with a standard carbine weight buffer and spring and full auto BCG. Couldn't ask for a better setup. Pistol length 223 gas systems can be tricky to get to function reliably but this is too notch. Barrel and hand guard are beautiful and well put together. I have recommended this to a few friends and would strongly recommend it to anyone considering this setup for an AR pistol or sbr. Very happy with the product and company. I purchased a 20 inch bull barrel upper with the Wilson arms match barrel and had equally reliable cycling and insane accuracy. Even though this isn't designed to be a super accurate tack driver, this pistol upper put up around 1.5 inch groups at 100 yards with a verity of ammo between 69 and 77 grains and a 1-4x scope. Very very high quality upper ar a very competitive price.
    Jarred

    Looks great

    Haven’t got any rounds through it yet but is well built and shipped fast. Can’t wait to get it all Together and shoot it
    Matthew T.

    Excellent Build Quality

    It's not often I buy anything from a 3rd page on google recommendations so I had to do some research. I finally pulled the trigger and ordered and have to say I'm thoroughly impressed. The fit and finish is amazing and the feel in the hands is quite perfect. I did find a small nick in the barrel finish, however, it is not enough to want me to contact the company and get it repaired or replaced. If I cared enough about it I would buff it out myself. Absolutely wonderful product, way better than I expected.
    James Lanier

    Review

    Empty review
    Brian noppe

    Review

    Empty review
    CK DESIGNS

    Awesome design

    The detail finish and overall design is Saweeet! Can’t wait to shoot it.
    Stephen Ruff

    Excellent Product quick shipping and a very good p

    10.5'' 556 NATO Stainless Barrel 12'' Rail - Slim Cone Flash Can AR15 Pistol Upper Assembly
    Jerry Helsing

    Very solidly built

    I have not had a chance to shoot this yet, however, I am extremely happy with the build quality. It is very sturdy and is exactly what I was looking for.
    Matthew T.

    Excellent Build Quality

    It's not often I buy anything from a 3rd page on google recommendations so I had to do some research. I finally pulled the trigger and ordered and have to say I'm thoroughly impressed. The fit and finish is amazing and the feel in the hands is quite perfect. I did find a small nick in the barrel finish, however, it is not enough to want me to contact the company and get it repaired or replaced. If I cared enough about it I would buff it out myself. Absolutely wonderful product, way better than I expected.
    Jarred

    Looks great

    Haven’t got any rounds through it yet but is well built and shipped fast. Can’t wait to get it all Together and shoot it
  • Details

    Details

    Current Stock: 63
    SKU: UA55N10SS08M428C_12ML00_SC
    Availability: Usually Ships in 24 Hours
    Old SKU: 105223SSPU1x7KMRL