I have a KAC, ordered a B&T current from group buy, but use a Osprey 45. The KAC is old school, looks cool, heavy and so so with sound reduction. I have been using a Osprey 45 since they came out many years ago on my shooter MK23. It is lighter, reduces the amount of sight picture loss, reduces sound very well and does not have a lot of blow back. I am certain it is not hurting the tank MK23 I own and use often.
Nothing like pig hunting from a bow stand (34 yards) with my MK23 and Osprey.