FYI LeeH and anyone else this may affect, I used to own a Lightning XL and because it has the Maxigrip rails normal scope mounts won't be suitable-iirc they are 14mm dovetails so if you speak to BSA or Sportsmatch they'll set you right.

You can use normal mounts but you'll get massive crossover at range other than zero range and general zeroing problems like running out of adjustment if you do.

HTH

Ben