Welsh Willy's BSA Mercury / Challenger Service kit

The Welsh Willy BSA Mercury / Challenger kits comprise of

Pre-cut spring
Delrin Top-Hat
Delrin spring guide
Delrin Piston Slip/Spacer washers x 2
Delrin Power-Bands x 3
Spring Grease
How to do instructions

THERE IS CURRENTLY A 25-30 WORKING DAY WAIT FROM DATE OF ORDER FOR THE WW KITS DUE TO VERY HIGH DEMAND.

OPTION OF PISTON HEAD CONVERSION KIT NOW AVAILABLE WITH KIT, CONVERT FROM O RING TO PARACHUTE SEAL