Adjustable, Sturdy won't bend like some drop forwards can.
If u tighten your set screws in to far it will scratch the track.
Ok this is good because you can adjust your drop forward to however you feel more comfortable. If you like your gun to be longer one day and shorter the next for a different style of playing you can move your on/off valve around. But you will need to cut different lengths or you could try one long and see if that one length will work for the different positions you use.
This is a great drop forward to use because you can adjust it to you not the other way around.