There is no "ak-47" paintball gun. there are many companies that make guns that are styled after the Kalashnikov series rifles. On the same note, Spyder makes several models of paintball guns, which vary from beginner "wallmart guns" to decent enough middle classed markers.
You can purchase a Spyder Paintball gun directly from the Spyder Paintball website. There are also options for new or used Paintball guns on eBay. There is a wide variety to choose from.
A paintball gun
Disassemble the gun, and replace the back cap with the stock or take it to a paintball store, and ask them to.
.68 caliber. the paintball standard.
They are listed as "spyder" threads. It shares them with piranhas and several spyder clones
Almost all of them. You need to be much more specific in what you mean by "better" and ask a less open ended question.
No. There are better, higher quality guns in the same price range. Azodin, tippmann and the Spyder mr series would be better.
no pirahnas are lower quality knock offs than spyder, they are not too bad for starters but spyder is better if you have a choice
Standard .68
as long as it is spyder threaded yes
The salvo has more accessories and has a better feed neck and stock then the Mr1.
Tippmann 98, very durable and easy to fix.