No. Piranha makes cheap, but unreliable markers in the low to mid range markets.
Which marker. Piranha does not make a pump gun i believe.
$50
No, they are separate.
There are no "a" or "b" buttons for paintball guns.
Not really. For the price there are several better markers. The quality of piranha markers is not as good as say Azodin or even Tippmann. The marker has very poor ergonomics and is 30 dollars overpriced for what your are getting.
Yes, many dealers have upgrades in stock. Check ActionVillage.com
its a good starter gun
There are some companies that made after marker parts for the Piranha, though they would be a very tough find at this day and age.
There is a wide variety of starter guns. The Tippmann 98 Custom is probably the most durable, but if your are looking for a faster, more speedball type gun, I would highly recommend the piranha EVO. It's running at about $200 or less.
12 and up
for woodsball yes its a good gun but not so much for speedball
The purpose of a paintball gun is to fire paintball pellets, to mark opponents in the game of paintball.