Description
TWC Ultra Premium Kit for BSA Airsporter Mk4 to Mk7 and S
This kit contains all that is required to Ultra Tune your weapon, including standard mainspring or upgraded mainspring please choose your preference when ordering. Also includes Ultra Spring Guide, Top Hat, Piston washers, Breech/Transfer seals, Ultra grease & lube, along with full instructions & parts plan.
Extra Information
Brand:
TWC
Choice of springs-:
Standard, OX, OX Accelerator or Titan
