You cannot add "CMMG 99A68A2AB Dissent MKGS 9mm Luger 33+1 6.50", Black, Picatinny Brace Adapter, 5.50" M-LOK Handguard, Left Side Charging Handle, Zeroed Linear Comp, TriggerTech Trigger (Glock Mag Compatible)" to the cart because the product is out of stock.