Dye Reflex marker is all stock minus the TechT bolt.
Better gas efficiency, much quieter, near zero kick, less shoot down, more consistant chrono
A few replacement gaskets shipped with the kit.
While using my new Dye Reflex for the first few months I noticed several problems with the stock bolt. It was subject to several eposiodes of shoot down while rapid firing and had very incosistant velocities over the chrono. I am usually not one to go right out and spend more money on a $500 gun. I was directed to the Techt bolt by a friend. I must admit I was very skeptical. Well I was dead wrong. It performed not a little better but a TON better. All the velocity issues vanished. It is much better on air and shoots as smooth as silk. I can not beleive how much more quiet it is as well. It has performed better than expected.
I would recomend this bolt to any Dye Reflex owner. Even if you are not experiencing the problems I was having the added bonuses of the air efficiency and smoothness alone are worth the price.