Durability. I'm putting one on a .454 air rifle to quiet it down a little, but it has a lot of fpe and I shoot Speer roundballs so clipping would blow it apart.
I'm with you. I would like to know the best platforms, bolt size, caliber, etc for air archery. I shoot a longbow that gets about 190 fps with pretty good accuracy, but would like to explore an air archery kit.