SCAR 17 Shoulder Ring

A precision machined ring that slips over the existing muzzle threads on the FN SCAR 17S rifle.  It precisely bears against the thin factory barrel step to create a large "true shoulder" which allows any (at least any we know of) muzzle device to be installed and aligned properly. Turned from heat-treated 17-4PH stainless steel and finished with a Melonite coat.

OD: 0.75"

Leaves 0.60" of threads exposed