Correct, the Barnett Spitfire is a re-branded, early-version Webley Tracker (a mutual deal with Barnett; Webley sold their crossbows for several years). The front sight behind the muzzle weight is a modified Webley part; the weird "backwards" open rear sight was a Barnett gadget. These sights are seen only on the Spitfire, which also deleted the Tracker's ability to mount an open sight behind the breech.
This was the last classic tap-loading design made by Webley, along with a long-barreled version called the Viscount (which Barnett did not import). The two were introduced in 1983 or '84, replacing the earlier Osprey, and made for more than a decade. Later examples have some minor internal improvements, and a wider, ribbed, set-back curved trigger blade.
In the UK, there were optional Deluxe editions of the Tracker and Viscount with checkered walnut stocks, and even a Tyrolean for a while! A .22 Viscount Deluxe is one of the rifles I most regret selling...!
The Tracker's muzzle weight mounts via an ingenious design that "floats" it from the barrel without screws. To remove it, push it firmly rearwards to reveal a big O-ring in a recess at the muzzle. Pull the O-ring off, then the weight will come off. There is another lighter O-ring at the back.
To me Webley rifles of this era are very underrated. They are ridiculously durable, have a very efficient powerplant, crisply made stocks, elegant styling, and metal polish and blueing quite superior to any German airguns of the day. The fixed barrel and neat compact size of the Tracker are added bonuses - one of my favorite sporters.
