Sterling Arms International as a lightweight, match option for the AR10/102 platform.
SPECIFICATIONS
Calibre: 6.5 CM 
Length: 19
Weight: Medium Profile 3 lbs
1/8 5R twist
416R (rifle grade stainless steel)
Muzzle threads are 5/8-24
Uses standard .750 gas block
Double stress relieved during manufacturing
Utilizes a standard DPMS pattern barrel extension
Hand lapped and honed for match performance.