No.1 Fits : BSA Airsporter, Mercury, Challenger, 635 Magnum, Supersport, Lightnings, Superstar, Goldstar, Centenary. Air Arms Firepower, Jackal, Woodsman. Original Model 34/35/36/38/45/(48/52/54 Std. power) HW99, FWB 124/127 No.2 Fits : HW80, Webley Eclipse (FAC), HW90 (to replace gas ram) No.3 Fits : HW77 (FAC), HW97, Original Mod. 35/45/50. Hammerli 401 No.4 Fits : HW35, Webley Eclipse (Std.) Original Mod. 48/52(FAC) No. 5 Fits : BSA Meteor MK1-5, Diana Mod. 24/26/27/28/G46/70/71/78/79/80, Vostock No.6 Fits : BSA Meteor MK6 & Mk7, BSA Comet, Crosman Phantom, Mod 800. No.7 Fits: BSA Polaris, Webley Tracker, Osprey, Excel, Viscount, Xocet, Stingray, Falcon, Hawk MK1-3, Norica, Relum (using existing inner), Baikal, Cometa 5, Haenel Mod. 303, Gamo Sniper, Commando, Delta, Apache, CF16, Rangemaster, CFX, Statical, Magnum, Gunmark Phantom, NAC, HW30, HW55 & HW55T, Gamo 1000, Shadow, CSI, Whisper. No.8 Fits : Webley Vulcan, Omega, Longbow, Tomahawk, HW95, HW98, Gamo 3000 No.9 Fits : Air Arms TX200 MK1 & MK2, HW57 Also Can Be Used In Airsporter, Mercury, Supersport, Superstar & Goldstar In Conjunction With Titan Tuning Parts To Give A Smoother Firing Cycle. No. 10 Fits : Air Arms TX200 Mk3 No.11 Fits : SMK – All Models – Reduce length to size. Stoegers No.12 Fits: Cometa 100, 200, 300, 400, Fenix, Dragon. No.13 Fits: Gamo Paratrooper, CF20, CF30. No. 14 Fits: Diana 350 Magnum, Webley Patriot. No.15 Fits: HW45 Pistol. For over 30 years Titan Mainsprings have been supplied worldwide to airgun enthusiasts, professional airgun customisers and the Gun Trade and have established themselves as the top quality mainspring against which all other mainsprings are compared. Only the finest quality Grade 1 Swedish Silicon Chrome Vanadium Spring Steel is used. We use no mass production methods. Every spring is hand wound to an exact specification, then heat treated and tempered to ensure ultimate performance and maximum durability. During final tempering, they are coated with a specially formulated hard, but flexible finish. This is a high technology coating and its self-lubricating multislip properties eliminates the need for conventional spring lubrication. The almost friction-free operation of the Titan XS Mainspring reduces the possibilities of dieseling to a minimum and increases power by up to 40% for FAC rated air weapons. Maximum power is maintained for longer than most other springs. Titan XS Mainsprings do not lose power when left cocked for long periods. All Titan products are fully guaranteed. Titan XS Mainsprings are available for all makes of air weapons, please contact pastimesgunsandtackle if you cannot see your rifle listed.