Viewloader 9 Volt Revolution - The Halo TSA has more paddles, longer battery life, more balls per second, has the Tilt Sound Activation feature, holds more balls, has a stronger shell, and has auto shutoff, but is more expensive.
Piranha E-Force VTL 2k3
32 Degrees 4-Stage Expansion Chamber
32 Degrees Green Flame Drop Forward
32 Degrees 20oz CO2 Tank with On/Off Valve
PMI Ram Air Chamber
Thumb-Screw Rear Velocity Adjuster
12" J&J Ceramic Barrel
-Tilt Sound Activation
-A little loud. Not a big problem.
-Tilt Sound Activation means that it is activated by the sound of your paintball gun firing, therefore is spins every time you shoot. This means that instead of waiting for a gap, it is prevented. The Tilt Feature is that if you tilt the hopper to the right, it spins counter-clockwise. If you tilt it to the left, it spins clockwise. This makes sure that paintballs are always being pushed in the direction of the feed neck.
-In my experiance with this hopper, I have had it dry fire a couple of times. It only chopped one time, when I was pinned down behind a tree, just holding down the trigger in Full Auto mode for a long time for cover fire. Eventually, any non-force feed hopper would either chop or dry fire.
-The operation of this hopper is very simple. (At least on the LED version.) All you have to do is press the button once to turn it on, and hold down the button until a red light comes on to turn it off.
-On the LCD version, there is a ball counter and timer, but I don't know the details on those features because I purchased the Backman LED.
I recommend this hopper to anyone that doesn't want to risk breaking the shell, wants pretty fast balls per second, but can't afford a force feed hopper like the Halo B. I give it a 9.