No. The Bt4 uses A5 threads, and the Tm 15 (a modified invert mini) uses Autococker threads.
No.
It will preform the same as the bt4 and the tippmann 98. It is a beginner marker, so compared to the entire market it is not "good" I is however an excellent starter marker.
yes
No. The Tippmann handle is screwed on from the bottom, where the bt is held on s rail.
No It uses a screw on the top that goes into the a5, the bt4 uses a rail system. Besides the Bt-4 already comes with a better hand-grip then the A5.
The same as every other paintball gun, louder then an airsoft gun, softer then a pellet gun.
Any of the Tippmann/BT4 guns have the most aftermarket parts. not only barrels, internals and electronics, but outer grips, shrouds and other aesthetic parts.
If they use standard threads, then yes.
Yes, the Shocktech regulator has standard asa top threads and standard macroline bottom threads, which is what the ION uses
If it has threads on the top, you refill it like any other tank by taking it to a sporting goods store or paintball field. If it does not, then it is a disposable, and you cannot refill it.
pbnation.com b/s/t threads are best place. can also do ebay or craigslist but pbnation is your best bet
The purpose of a paintball gun is to fire paintball pellets, to mark opponents in the game of paintball.