If you own a SCAR 17 and have had issues with the muzzle device making contact with the shoulder of the barrel or had concerns with the narrow shoulder on the factory barrel, this should ring is perfect for you.
This KBA Custom muzzle shoulder ring is a precision machined ring that slips over the existing muzzle threads on a SCAR 17S rifle. It precisely bears against the small factory barrel shoulder to create a larger true should which will allow any muzzle device to be installed and aligned properly. The shoulder ring is turned from heat-treated 17-4PH stainless steel and melonite coated. The ring has an outside diameter of .75" and is sized to leave .60" of muzzle threads exposed.
This is the perfect option for any SCAR customer running a suppressor or non-factory muzzle device and especially for those running Thunder Beast, YHM, Gemtech or AAC mounts which do not make contact with the barrel shoulder.