I suppose that the TM is a lot more expensive than the JG? Since I'll need to resell internal, I should stick with the cheapest one right?

yep
there aren't that many internals you're going to resell, just the mechbox, battery, inner barrel and hop-up.
you will probably need the rest (ejection port cover on top of the gearbox, trigger assembly etc) for your mod.
you'll probably have to change the outer barrel also, I think it's too small for a paintball BB.

Not interested in using a Milsig marker instead, thus making it mag-fed ?

Ok, critical question, do you have any idea what you are doing? Do you have the machining equipment and know-how to pull this off?

You'll need more than a dremel and high hopes to pull this off. By the very nature of what you are doing, both the paintball marker and the airsoft gun will be permanently modified.

Not trying to be mean, but it would be a damn shame if you destroy two guns for nothing.

Oh do not worry. I have a good complete tutorial on youtube. The A5 won't suffer any modification. As for the AUG, only the shell will be modified (for the cyclone system)


I also tought about a mag feed marker. A paintball AUG mag fed would have been so bad-ass. However, for now, I will stick to the plan xD (since my tutorial isn't for mag fed.)