Aero Precision/CMT UHPR MOD 4. 13.7 upper

New upper built by Ray Gunworks 
Aero precision upper
Ballistic advantage 13.7 5.56 barrel 
Carbine length gas system .750 
1/2x28 threads 
Cross machine and tool 12.5” UHPR MOD 4 rail
No bcg, charging handle or muzzle device included