WTS one used piston sleeve for the SWR Trident LCD (Booster/Nielson device) threaded in 13.5x1LH. This is the sleeve ONLY, NOT the LCD. It has literally 100 rounds through it. I am in the process of getting all my barrels in 1/2x28 and no longer need this sleeve. Asking $60 shipped to Cont USA and will take PP plus 4% or Postal MO. Will post pics soon.