It was made for marking trees
James Hale of Daisy Manufacturing, invented and patented the first paintball gun.
Crossman. They made the Nelspot 707
No, they aren't... They are made by the company "Battle Tested" (not Ben Tippmann). However the Tippmann 98 and BT 4 are nearly internally identical.
Depending on the gun most high end markers are made out of Anodized aluminum.