Austen SMG Barrel Collar w./Sling Swivel

If you have a Sten Mk2 or Mk 5 SMG , this barrel collar with sling swivel is a super upgrade as it screws directly onto the barrel nut and provides a nice appearance with the added feature of a sling swivel at a more desirable location on the gun.  Originally produced for the Australian Austen SMG, this fits perfectly on the Sten Mk2 or Sten Mk5.  Original unissued part that was manufactured about 50 years ago in Australia. Limited availability !