easy to install
rear cocking (internals cleaner)
velocity adjusting on 2ndry regulator ( I like this location better)
2ndry regs with nitro are much better than expansion chambers with CO2
Tippmann supplies a FREE beaver tail, made of aluminum (bends easy); I went to the local hardware store, for a couple dollars, purchased 1/8th steel rod and bent into shape to replace the aluminum. Beaver tail problem solved.
It's worth the $120; you get the advantages of nitro over CO2. My shots are tight, can't wait to install responce trigger with 12 volt rev.