LaRue Tactical Stealth M4 6.5 Grendel Threaded Barrel
It was installed by a gunsmith. Apparently he was not as careful with the finish as I would have liked.
Round Count - 10.
Specs:
18" 6.5G STEALTH Profile barrel with a 1 to 7 twist
5/8x24 threads
M4 feed ramps
MID length gas system
Cash - meet in Round Rock