This gun is so nice, it's like a dream, the four eye thing in a way is kinda cool, and out there, but really uneccesary. I mean you will never chop now for sure, but its kinda over the top doing it, in the fact that the duel break beam eyes work fine. Other than that this gun is unbelievable, and really nasty. The combonation of lightweight, super fast, and air efficient, you can never go wrong, other than that it looks great too.
Conclusion:
Buy this sweet marker, it is one of the greatest guns to hit the market, and will change the paintball industry for sure, everyone is going to copy the four eyes now, just like they copied the idea of eyes from bob when he made those way back when. My point being this marker owns, buy it. Thank you bob for another great piece of art.
I dont think the extra set of eyes was to stop chopping but to speed it up. When the 1st set of eyes see's the ball the bolt starts moving forward so its already moving by the time the ball hits the 2nd eye.
Andrew and and ericfreakyv are right, the second set of eyes isn't there just to help prevent chopping. The top eyes register the ball, and then it is timed how fast the ball goes fromt he top set to the bottom set of eyes, telling the gun how fast the hopper is feeding. Then the gun changes it's rate of fire accordingly. This process speeds up the gun an insane amount. It's kind of like with the Pulse with RF chip. Instead of having to wait for the ball to fall into the chamber, the eyes register that it's there, and then fire the gun, the onyx knows how fast the balls are coming down, the board actually starts the firing process a split second before the ball is fully in the chamber, because it knows when the ball will be there. Thus making this the fastest gun on the market. You can see the video on youtube of it shooting 31bps. That's actually with paint, not that cycling crap.