only if the mp5 is a Tokyo marui clone. if it is a clone then it should be able to use any Tokyo marui accessory or part, because it is an exact replica of the Tokyo marui.
yes all cs can fit with each other
if the clip or mag is labeled airsoft it will fit a real ak mag wont fit
No, the 22 Mag will not fit.
No mods are needed to take the other mags,just tear the rifle down,when you do this the stock 10 round mag will fall out! then put it back together and your new mag will fit but, keep in mind the sks is not made to have detach mag!
No, they are different magazines and will not fit each other. The Mrx holds 10 rounds, the t68 holds 20.
No
yes
Yes
No
Possibly. The rounds should fit into the mag. The feed is more based on the trigger group than the mag (mag has almost no feed lips).
No
no