If they say Hammer Forged they are FN. https://palmettostatearmory.com/psa...4-m-lok-upper-no-bcg-or-ch-pinned-welded.html
Scroll down to the bottom: Barrel is made for Palmetto State Armory by FN Manufacturing using their proprietary blend of Hammer forged chrome molly vanadium that is referred to as "Machine Gun Steel" by virtue of its use in FN's M249 and M240 weapons.
Scroll down to the bottom: Barrel is made for Palmetto State Armory by FN Manufacturing using their proprietary blend of Hammer forged chrome molly vanadium that is referred to as "Machine Gun Steel" by virtue of its use in FN's M249 and M240 weapons.