Our new complete AR-15 Upper Assembly has a 16″ M4 contour barrel profile with 4150 M4 Contour Barrel
Complete comes with 5.56 NATO Carbine Length Gas System
Also features 15″ MLOK rail and carbine length gas system – 1:8 twist. The M4 flat top forged upper receiver with forward assist is designed and tested to withstand some of the harshest punishment you can put it through. T
This complete upper receiver is ready to go! Just pop it on your lower receiver assembly and hit the range! As always, we’re proud to be Made in the USA! Keep America Working!