ApexHD(tm) Rifle series beating heart.

Each upper receivers assembled using American made Materials, assembled in the State of Texas. 

Parts break down as follows:

 - South Texas Arms billet Upper Receiver - 7075T6 aluminum

 - South Texas Arms nitride treated steel gas block (optional adjustable gas block)

 - South Texas Arms stainless steel gas tube and roll pin

 - Your choice of Standard A2 flashhider, or suppressor mount (additional charge).

 - Nitride Treated bolt carrier group

 - Radian(R) branded Charging Handle

 - Nitride treated 4150CM 16" barrel, in 5.56, 300blk

 - Griffin Armament RIGID 15" rail - Mlok

 - Griffin Armament BUIS included