The vigilante come with 2 rotary magazines one for BBs the other for .177 pellets, the barrel is rifled so I would question why you would want to shoot BBs. You can purchase extra magazines cheaply , 3 for £8.49 is the going price. (a lot cheaper than the umarex ones )
Below are the specs on the Vigilante
435 fps w/lead pellets
The only negative with these is the handles, you unclip them to get at the CO2 powerlet , they feel a bit flimsy and you feel that you might break them, however my son has had his for 2 years and they are as good as new.
Below is my gun and my son as a comparison, I suppose it really boils down to which one you prefer.
for the cost of £75.00 these are damn good guns and accurate we shoot tin cans at 20 yards down the garden. Next thing we want to try is IPAS (iron plate action shooting).