Smart Parts broadended their patent, and it was revised in January. The patent is very broad. The patent covers ANY paintball marker that has an on/off switch. This means Spyders with electronic triggers, Intimidators, Angels, Matrices, Bushmasters, and anything else with a battery will be in violation of Smart Parts' patent.
On Friday, a judge approved Smart Parts' request to proceed with their lawsuit for patent infringements. On September 3rd, a trial will begin. This is moving very quickly.
As a patent consultant myself, and can not understand how the patent can be granted, as it will impede technology, which is one of the things that a patent can never do.
Smart Parts is rumored to want a million dollar signing fee, and $75 per unit sold for a royalty fee.
I would recommend contacting Smart Parts and expressing your concern.