I would recomend First Strike (FS) air tanks. They’ve been making them for years, are DOT certified, etc. etc. Use the ones with Low Pressure bottle regulators(Attached to the bottle). Then I would choose a good Polarstar or Wolverine regulator for the airline. AmpedAirsoft airlines are really well made and heavy duty, so I would pick one of those up. In fact, they may have a ready to go package (regulator/line/tank) that may be worth looking at.
Do your ‘due diligence’ and check the price. Sometimes the bundle pricing isn’t worth it. As far as wich adaptor to use, that kind of depends on how you want to run it. Some guys will just tap the existing magazines. Others are using a premade magazine adaptor that aeg magazines attach To. Amped sells both types. Take a look and see which ones you think will fit your needs. Which ever system you choose, will use the same type of release valve as the stock gun, if not the same brand. I’ve not done a Hicapa, but have ran tapped rigs on other Gbb things. I have used P* and Wolverine regulators, both with no issues, but always felt the P* was a little nicer finish. I use Redline engines, not really applicable here, and found they work well, but once again; P* is a little better.
Looking for the ultimate Airsoft HPA regulator setup for your HPA unit? The PolarStar MRS Regulator System with Amped line has an insane recharge rate!
The First Strike 48/3000 XLP Tank makes for a great all around tank for HPA setups. Compatible with SLP and all other Airsoft regulators on the market.
First Strike 13/3000 XLP Tank makes for a great low profile setup for HPA Air Stocks. Shorter than the average 13/3000 tank works great for on gun setups!
The TAPP Airsoft Tapp M4 Adapter for Hi-Capa converts your traditional gas airsoft gun to use HPA and accept standard M4 AEG magazines.
or you can go mp5 midcaps/HiCap rout:
All the things you need for your SSP2 HPA setup. Aluminum Tanks – in different sizes. Regulator with Line – for connection Adapter – for your pistol MP5 Magazine – for higher capacity Connector – both EU & US type and many more coming soon…