I'm going to buy a CA XM177 E2, which will be my first aeg.
I was thinking to upgrade it to 350 fps, which is the max fps that is allowed on a full auto asg at the club I'm going to join.
Is the PDI 150% spring a good buy?
I've also read that the main problem with this gun is to get a battery which fits, seen someone say that they believe that you should buy a nunchuck 9.6v battery.

So would this battery fit? http://store.matrixbb.com/servlet/-strse-2...OFT-2000/Detail

Have some problems finding a mini nunchuck with high mah, so if this battery fits, I think il order everything from that page, but they don't seem to have CA XM177 E2, instead they got a CA XM177 M15A1.
Is this the same gun or another version of it? Looks like the same gun on the pictures.

English isn't my first language, so some of the sentences might look a bit weird ;<

BTW: Im going to buy a Red Dot to the XM177, any suggestions?

Yes, that battery will fit
Yes, a PDI 150 will be good

They are the same gun
G&P Aimpoint is a great sight

Thanks for the answers.