One type of gun is a Tippmann. Tippmann makes may types of guns, but there most popular is the Custom 98 (left). 
The Custom 98 is the gun of choice for beginners, for its simplicity, accuracy, and its ability to converse gas. It gets bout 500 shots for 9oz of gas, most guns get about 275 shots for 9 oz's of gas.

Another popular Tippmann gun is the A5 (above). It is capable of more upgrades then any other gun in paintball. It has more than 200 upgrades available. 
Another product Tippmann created is the paintball grenade. It is capable of spraying paint in a 30 foot radius. It works just like a regular grenade you pull the pin wait four seconds and the throw. The only difference is that it does not shoot shrapnel every where. 
Another gun company is Piranha. Piranhas are also good beginner guns,  but with a different style than Tippmann. They are a lot cheaper, and not as good of quality.
The most popular beginner guns are spyders. Spyders are cheap and good quality guns. There electric guns are inexpensive and nice quality. The gun above is a fully automatic gun, and can shoot 13 shots a second.
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