Bisley Titan XS Mainspring No.1 Air Rifle Spring brand_-HSF Optical performance is built around

Optical performance is built around SCHOTT fluoride (FL) and high-transmission (HT) glass with ZEISS T* multi-coating and LotuTec weather-resistant lens coating

Adjustable sleeves and bottom hem

keeping the boot cooler and lighter than a traditional full-leather design while still standing up to daily wear

remove the scope

Bisley Titan XS Mainspring No.1 Air Rifle Spring brand_-HSF Optical performance is built aroundThe Bisley Titan XS Mainspring No. 1 is a replacement mainspring for spring piston (break barrel and underlever) air rifles, part of the long running Titan XS range of uprated UK made air rifle springs. The "No. 1" is the Titan application number that tells you which rifles the spring suits: it is listed to fit the BSA Airsporter, Mercury, Challenger, 635 Magnum, Superstar, Lightning, XL, Supersport, Goldstar and Centenary, along with the Air Arms