I just built one of these setups for one of my team mates that requested a reversed bottom tank on setup....
Here are a few pics for ya...
Parts list
A-5 Bottom Line Mount LAPCO Paintball Custom Products Rail Drop Forward - Black at ActionVillage.com : Paintball Custom Products ASA On/Off Adapter - Black at ActionVillage.com : Paintball
Yes it will fit a 20oz co2 tank... my team mate uses a PE 68/3000 tank with no problems
Pics with 20oz
