If you're set in a big tank + amped line, then probably your best option is Wolverine's STORM onTank regulator. It works great and will be a much more streamlined setup than a Palmer or a Firebase.
The connectors you need for the mags are normally called quick disconnect nipples or quick disconnect plugs. In your place I would just ask Amped about it and buy everything from them, they are probably the most knowledgeable store in the US when it comes to HPA setups.
The connectors you need for the mags are normally called quick disconnect nipples or quick disconnect plugs. In your place I would just ask Amped about it and buy everything from them, they are probably the most knowledgeable store in the US when it comes to HPA setups.