Ah, the paintball topic... again. This is a topic that gets brought up alot, whether it be about making a halo paintball gun like you want to, or paintball armor, most people arnt going to be that helpful because, from what ive seen, its the same people who bring it up. noobs. People new to the site/community who havnt ready up on how things work.
The general consensus when it comes to paintball related topics is:
The 405th does not encourage, support or endorse the making of homemade safety gear or functional weaponry that can potentially cause harm to oneself or others in any way, shape or form. The methods contained within are for the construction of props and costume pieces.
No one is saying that u "cant" do what you want, but some things shouldnt be attempted unless you have a full understanding of what exactly it is your trying to achieve. Custom engineering a working paintball gun is one such thing. Ive worked at paintball fields and maintained paintball guns before, and they are complicated little chunks of metal, any attempt to modify or build one from scratch shouldnt be attempted, unless your a gunsmith or something

because of all the hazards associated with them. Paintball gun ARE potentially lethal.
If u really want a halo paintball gun, get a stock standard gun and build a shroud for it so your not changing the gun itself.
The 405th community is full of helpful people that are willing to provide advice and expertise to others so we all learn from one another. Ya just gotta make sure you dont sound like your coming across the wrong way. If you are new check out this video:
New Recruit Orientation Video -
http://405th.com/for...showtopic=17078
Adam explains everything straight up for all the noobs

Dont take any of this the wonrg way, im not putting you down, just shedding some light on things. Cause really the 405th is about making kick arse stuff.