Titan XS Mainspring No. 1

Fits BSA Airsporter, Mercury, Challenger, 635 Magnum, Supersport, Lightning XL, XLSE, Superstar, Goldstar, Centenary Air Arms Firepower, Jackal, Woodsman Original Mod. 34/35/36/38/45/(480/52 Std Power), 54, RWS Firebird, Falke Mod 80-90, HW77(std power), HW99, FWB 124/127 The Titan XS is a round section mainspring made from the highest quality Swedish Grade One Vanadium Spring Steel Each Titan XS spring is hand wound to exact specification, then heat treated and tempered to ensure ultimate performance and maximum durability.The almost friction free operation of the Titan XS Mainspring reduces the possibilities of dieseling to a minimum. Maximum power is maintained for longer than most other springs. Titan XS Mainsprings do not lose power when left cocked for long periods.