Some bio bbs will disintegrate faster. Most will just be innert and not leach plastics into the enviroment. Honestly after a rain fall or two bbs vanish.
Spring/aegs are about the same price but you get what you pay for. Start upgrading and the price changes fast. An entry level aeg with moderate upgrades is very gameable but an entry level spring will cost double after making it gameable.
Gas is a different animal. Usually they are decent priced but mags cost 5-10 times more than aeg magazines easily. Upgrades will run you similar to aegs though. If you want a rock solid gas gun on a budget, get a kc02. It is semi auto, mags arent that outrageous and it is based on the real 10/22 making it very upgradable.
Originally Posted by TokyoSeven
1+1 = 2
Were you maybe expecting 1+1 = donut?