HPA/nitro help

OK, im sorry to be asking this when its probably writen all over the forums but I've been thinking of upgrading my stock a-5 to nitro and im reluctant to spend 80$ on a tank when some answers are not spelled out in front of me.

Any ways, my first question is do you need any upgrades for the a-5 for it to take nitro/HPA (correct me if they are not the same thing, or similar) like gauges chambers etc. or can you just plug it into the same thing co2 goes into?

My second question is do any remotes work for it?


and finally, i was wondering who easy the upgrade is, ie is it easy to tune the gun?

I really appreciate it and I know people have said these things before, just not in a direct way.

thank you so very much

Edited by The Green

Thanks alot, now i have another question.  Can any HPA bottle be set to low or high pressure or do you need extra harware?  I was thinking of later on upgrading to the low pressure system. 

Also, does the amount of CI effect anything else then the amount of shots you can get out of one tank?  

Edited by The Green