Alexandar Arms is the original manufacturer of both Grendel & Beowulf rifles, you can buy a barrel directly from them.
Alexander Arms: Welcome to the Revolution
Double Star also makes barrels for the Grendel rifles, I think my brother mentioned that Double Star was a sort of sister company for Alexander, but I can't remember exactly, so don't take that as fact.
DoubleStar AR-15 M-16 Rifles and Carbines for Sale Service M-60 Parts
Still Waiting on the Double Star 6.5 Grendel Upper.
You are correct Double Star does make complete uppers for the 6.5 Grendel. Unfortunatly Double Star is the supplier for for the uppers and mags that CFS has had on back order since October..... Still waiting patiently..... In the mean time I purchased a NEW DPMS .243 Panther with a 20 inch barrel with the Phantom flash hider. The .243 as many may know is 6 mm cal so this rifle should be an excellent target/ hunting gun.
Originally Posted by vbrtrmn
Another up side of this is that the .243 Winchester is .308 necked down to 6 mm. That means that the bolt, magazines and receiver for the .243 can be used to convert the rifle to .308 by simply changing the barrel. Anyone else out there shooting the Panther series rifles by DPMS?