This is a AR-15 5.56 NATO upper with Yankee Hill Chromed-lined barrel. Mil-spec upper receiver with M4 Feedramps with 13 inch Troy Alpha Rail Free Float Forearm. YHM barrel in 1-7" twist. We check headspace and test fire after Final assembly. This barrel will stabilize all 223 or 5.56 NATO bullets up to 95 grain. Our customers are reporting that upper assemblies using these barrels are consistently shooting 1 moa! DOES include bolt and carrier, or charging handle. 

Machined, 7075, T6 aluminum, upper receiver, with a 5" long flattop rail, accepts Picatinny-style rings and your tactical accessories. Finished with mil-spec, hard-coat, black anodizing for protection from scratches, mars, and abrasion. Includes case deflector, port cover, and forward assist.

Precision Firearms M4 Flattop Upper
Yankee Hill 1 in 7" twist 16.5” Chrome lined Steel Barrel

Precision Firearms Bolt and Carrier Group

Precision Firearms Charging Handle

Precision Firearms NOX Flash Hider - Kill 90% of Flash!
Troy Alpha Rail Free-float forearm 13 Inch with M4 Style Spring Deploy Sight

Steel Gas Block

Stainless Steel Gas Tube

FREE SHIPPING

Weight with carrier - 4lbs 6oz.

Limited Lifetime Warranty

Feel free to ask all the question you have. We take the time to answer them all!