the rapid was made in fac aswell as 12ft lbs, ive got one on fac, the cut out in the stock at the rear of the bolt was done at the manufacturing stage, most pcp`s can be tampered with. but as long as this rapid shows 12ft lbs or less on a chrono then its legal to own off fac. if you want, take it to a gun smith and get the adjuster blanked off and a certificate of power of him.
Sounds a bit of a mine field.I see a mk 1 for sale at the moment on the listings page and they come up fairly regularly. What other guns should one avoid if there is to be no question as to whether it is a sub 12ft l