I stumbled across this auction on Gun Broker. Description and photos are from the auction. This rifle is one of twenty-five that were produced.
Auction description: This is a Colt CSASS901 rifle, 25 were initially built for the US Army competition which Colt did not compete in. Serial number range is MCC009328 to MCC009352. Of those 25 rifles 5 were sold internationally, 4 to employees, and one to Bob Foulkrod as part of his 6.5 Creedmor setup. The rifle is hard coat anodized in a FDE color. The rifle has a smooth sided extended upper receiver, 16″ match grade barrel, Lightened Bolt Carrier Group, SureFire muzzle brake, ambidextrous lower receiver, Giselle Trigger System, ambidextrous charging handle, Rail mounting kit, extended receiver extension tube, Vltor IMod Buttstock, Magpul Pistol Grip.
What an amazing piece it would be to have in a collection.