well, here's how it all works:
compare to the threshold:
as you can see it's a very similar operation, but the bolt is much shorter and
the dump chamber is a lot smaller.
quick run down if you're not familiar with the threshold (or any other blow
- at rest the forward and rearward chambers are filled with air
at the same pressure (no LPR). the bolt is held rearward due to geometry
(more area for the pressure to act on rearwards).
- when the trigger is pulled the 3-way solenoid vents and releases the air in
the forward chamber. the air in the rearward (dump) chamber pushes the
bolt forward and once it clears the back cap it vents down the barrel and
fires the paintball.
- then the solenoid resets and the pressure pushes the bolt back to the
*as with the threshold animation, the dump chamber/airlines/reg are not going
to completely empty like in the animation. it was just shown that way for
clarification. the pressure will drop considerably, but there will be a constant
supply of air from the reg during the firing cycle.
FYI, the iQ (Europe only) has a venturi-style bolt with a cupped face and
multiple air outlets. i drew it with an open face for simplicity and in the hopes
that the G3 (US only) will be made this way