10.5" 556 NATO Parkerized 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.
- 10.5" 556 NATO 4150 Chrome Moly M4 Contour Parkerized 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.
ReviewsMichael RitchieMy upper came as advertised with a great quality finish. It arrived earlier than advertised as well. Overall wonderful purchasing experience…Paul
Great UpperUpper came very quickly even amid all the Coronavirus stuff. The quality of the upper really makes me happy and it looks pretty sharp. No scratches or discoloration anywhere. I would definitely buy this again and would reccomend to a friend 100%.David Upton
UpperGreat quality and shipped in a timely mannerCharlie Gustina
Chrome upperHave not received was expecting it a week ago said delivery was running late still have not got it.. not happy with USPS but I am an adult and a rational human being so I know in my heart that the blame is on USPS not AR15part.com. Ar15part.com shipped my order in less than 24 hours!! Ordered after they closed on the 10th and they shipped it on the 11th. 5 star service.Philip Ermino
10.5 AR 15 pistol upper .Built very well, and shipped fast.David Shumate
Great upperRuns smooth2AForever
10.5 inch 556 pistol upperGood fit and finish. Paired it with an SBA4 brace and Romeo5 red dot...super fun to shoot. Good accuracy even with my cheap old ammo. I highly recommend it!!!Barry Cariaga
Thank you!Thank you! Your easy to work with and Thank you for contacting me. I will be purchasing more from you. Stay safe and keep up the good work!Nicholas Logsdon
Very pleasedThis is exactly what I ordered and expected. ar15part.com shipped the item out very quickly! USPS dropped the ball but that doesnâ€™t reflect on my opinion of ar15part.com HIGHLY RECOMMENDED!
Leave a Review
DetailsCurrent Stock: 122SKU: UA55N10PA07M428C_12ML00_SCUPC:Availability: Usually Ships in 24 HoursOld SKU: 105223CMPU1x7G2RLK