|Convert your Pyschoballistics Superbolt, WGP Minicocker or compatible marker to an Ultralight Sniper style pump-gun! This hard-to-find set features an ergonomically designed, 4.25in ribbed composite Delrin self-lubricating pump. Comes complete with matching aluminum arm, pump return spring, custom gas thru pump post and block gas plug. Installs in minutes with no mods required. You can switch back to semi auto! Black. Won't fit the Autococker, Lightning or Trilogy. Improved design eliminates the need for o-rings!