The Jackal Firepower
Jackal Firepower was created by adding an 'autoload' tube over the barrel of the Hi-power. The autoload held around 30 pellets and gravity fed a single pellet as the user operated the loading tap, its statistics were:
Weight 7lb 12oz
Overall length 40.5
Barrel length 15 inches
Max FPS 610
Trigger Pull 1 – 4 Ibs - later models were not adjustable
The Firepower suffered a little from inconsistent seating of pellets from the autoload system. The review in the January 1982 Airgun World noted that "The best result I managed in 2 1/2 hours of trying was a little over 50 per cent of the pellets perfectly seated". The sights were also called into question in the same review.
The Woodstock version weighed in at 8lbs and was fractionally shorter at 40.25 inches.
The last time I can find these offered for sale is
There are various pictures and adverts of an AK47 lookalike made from a Firepower. I have found references to a model number JK47 from the Pheonix Arms Co, but I am not lucky enough yet to have seen one of these 'in the flesh'.