The seat it's self is not adjustable.I believe they made the straps long enough so it slides all the way back when you stand to shoot.That bothered me at first but I'd rather be able to slide the seat back than sit closer to the rails.Besides that,having the seat lower allows you to use the side rails as a nice armrest.

The new seat comes as a kit with new hardwear for $29.It takes about three minutes to swap.