Some of them do, it depends on the model.
Autococker threaded.
Any autococker threaded barrel.
No. The Bt4 uses A5 threads, and the Tm 15 (a modified invert mini) uses Autococker threads.
No, its a mechanical gun
you might might mean an autococker this is a type of paintball gun that automatically recocks itself or possible your speaking of a response trigger google tippmann a-5 with response trigger theres all the info you are gonna need !
It's a semi-auto autococker with its front pneumatics taken off and pump handle put in it's place. As for how it's "Good" is all a matter of preference. Some people enjoy the thrill of using a pump, while others like me are just too broke to by a case of paint for a day of paintball
Depends on what kind of gun you have. I would take it to the local paintball store.
Generally it is bad to leave batteries in anything battery operated for long periods of time. I have ruined more than one useful thing because I left batteries in until they started to corrode. In the case of paintball guns, leaving batteries in is essentially the same as leaving a low grade weapon around for anyone to use or misuse. You can do damage with an improperly handled paintball gun.
9 volt batteries are slightly more than a dollar.
No, they are two entirely separate brands/concepts. Brass eagle is a company sells entry level, cheap, lower quality markers. Autococker is a type of marker that can range from low grade entry markers, to high grade mechanical, and highest grade pump guns.
Disassemble the gun, and replace the back cap with the stock or take it to a paintball store, and ask them to.
Regular .68 caliber paintballs, all standard guns do. Also there is no "m16 paintball gun" , only guns that look like it.