got to agree with the above with the exception of the AA fields.
my mk2 carbine is great with AAfields and groups really well. I havent tried all the other pellet types in the cupboard yet but its already so good I cant complain. Only point to watch is the magazine indexing. There is a small spring that holds the indexing arm in against the magazine as it rotates. if this gets dirty (which with some use and lead particles) then this doesnt fully follow the magazine round as you cycle the action and gives the impression of a jam. All it needs is to be kept clean and its fine.
Otherwise cycling the action is quick smooth and you can stay on target focussed through the scope while you reload (always useful )

Its my bunny basher of choice despite having offerings from Ripley, daystate, AA, falcon theoben, BSA, ISP, skan and others to choose from.
Its not a cheap gun but then it doesnt perfrom like a cheap gun and no mine isnt for sale.