05-13-2012, 04:40 AM
As the Shrike sits now, it uses it's own bolt, bolt carrier, etc. Pretty much nothing AR would be compatible in the upper. A new one would have to be made that was Grendel specific in dimensions. I.E. Grendel Shrike bolt, Grendel dimensions for feed tray, top cover, and receiver, plus their fit to each other. It's the kind of thing that Geoffrey Herring (ARES) could probably do, but with the history of the Shrike to date, I'd be doubtful it would happen...
If someone like Colt had the Shrike instead of Ares then I'd say they could do it in a heartbeat if they actually had the will, but Ares has trouble enough just trying to get 5.56 guns out the door. I believe that Herring has a good design in the Shrike, and he is a pretty smart fellow to have designed it but they have some serious issues with actual production. Hopefully they'll get that ironed out some day. If I were him I'd be working on the prototype for a .308 Shrike upper for Colt's CM901... After I figured out how to get product out the door on the 5.56 guns and make the customers happy...
If someone like Colt had the Shrike instead of Ares then I'd say they could do it in a heartbeat if they actually had the will, but Ares has trouble enough just trying to get 5.56 guns out the door. I believe that Herring has a good design in the Shrike, and he is a pretty smart fellow to have designed it but they have some serious issues with actual production. Hopefully they'll get that ironed out some day. If I were him I'd be working on the prototype for a .308 Shrike upper for Colt's CM901... After I figured out how to get product out the door on the 5.56 guns and make the customers happy...