16" 556 NATO Parkerized M4 Barrel AR15 Rifle Upper Assembly with 15" Rail and A2 Flash Hider
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.
- 16" 556 NATO 4150 Chrome Moly M4 Contour Parkerized Barrel with 1x8 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.
- 15" 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.
- Mil-Spec A2 Flash Hider with crush washer.
- AR15parts will customize (to your specificaions in the drop down menu) your AR15 upper with the Rail Type (M-LOK or KEYMOD), a Magazine or two, one of our High Quality Bolt Carrier Groups, and your choice of 5 different Charging Handles.
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.
ReviewsJonathan GrazianoI had tried to pick up an upper from Davidson defense and after 45 days instead of the 27 I was told. I gave up and had my money returned. How is this relevant? well I looked around and nobody had what I wanted or they wanted an insane price for the upper setup. However Ar15Part had what I needed and at a fair and reasonable price. I will be choosing them for all of my AR needs in the future. In addition, I received what I needed in about a week, a far cry from 45 days.Anonymous
quickQuick shipping and great parts nothing cheapDylan Stammely
thanksIts amazingLester Harman
thanksVery fast shipping considering all that is going on. Very pleased with the quality will for sure order from you again.Ken K.
Happy ShooterPerfect fit on my Custom PSA lower. Nice grouping using .223 and 5.56 55 grain ammo. I liked the fat look of the Cone Brake which is why I went with it. I would recommend any 223 Wylde by AR-15.Kevin B
Great value!I was very pleased with the product. The quality was very much appreciated. As well as the pricing.Thomas Armstrong
Great Upper Assembly and deal!Fast shipping and I love the upper assembly! Thanks for the great deal y'all. Fits perfectly with the lower I have and looks outstanding.Dimitri Frangiadis
First Build -Barrel looks great - looking to build soon and take it to the range - good communication after order/shippingJ.M.
Upper assemblyGood assembly and fast shipping no issues it works like it should
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DetailsCurrent Stock: 331SKU: UA55N16PA08M428C_15ML00_A2UPC:Availability: Usually Ships in 24 HoursOld SKU: 16M4SSNU1x8RL