When i got this, I was really happy because it would supposedly speed up my ROF a little and improve trigger response. I was wrong, it didn't even fit into my GB, i had to file it down many times, and just to figure out that it was almost impossible to fit unless i took a contact out, and also the sliding contact did not even slide that well at all, it more like scratched against the rails. I was very dissapointed with Echo1 for this
Speed up ROF
Speed up Trigger Response
Did not fit in my GB it was even and Echo 1 gearbox.
Battery wire is almost too short to reach my crane stock battery
Concact rails scratch along, not smooth.
motor connectors are cheap.
Rating: [2 of 5 Stars!]