I had both mk1 & mk2
The mk1 was better imo as the reg worked well over the full charge, mine was accurate and faultless and because it was so good I fell for the mk2 sales blurb saying It was updated and superior, well mine wasn't with poor consistency and a powercurve and a very fussy barrel, plus the action is very noisey and sounded like bits were flying around inside, I never liked the mk2 as I felt it sucked me in and made me sell my perfect mk1
Id say look for a mk1, the stock guards the trigger, the mk2 has a metal guard. There probably is good and bad in both versions but Ive never shot a bad mk1, a buddy has just bought one and hes very happy with it.
Prices are around 450/500
Chris
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