I may have missed this, but is there an option for creating grenades that detonate upon impact? One of those gizmos that keeps 'em from detonating within 10 meters of the thrower might be a nice (but expensive) addition.

I dont think there are rules for impact grenades, but you can get an airburst link for grenade launcher munitions to ensure they explode straight away.

I have ruled that impact grenades exist even in hand-type munitions. Of course, dropping them once you've activated them is not a good thing and you can't bounce them around corners and the like.

Impact fused grenades are awesome...