Yes, you read that right ! We installed a registered Lightning Link in this Knight's Armament AR-15 Commando. We have installed a brand new KAC 556QDC suppressor on this factory gun along with an Aimpont Comp M4. The lightning link has a KNS reinforcing brace on it and the lower has a selector installed by JEC who specializes in Lightning Link adaptations. It has been fully run and tested ! WOW !