Mossberg blackhawk breachergrip gen 111 - BlackHawk Knoxx Gen III Breachersgrips

I bought this grip for my mossberg 590 shockwave 20 gauge. It did not fit until a remove some of the plastic on both egdes of the grip. When i filed some of the plastic, it fit. The fit was good after it was filed. I like my shockwave now with this grip. I think it is better than the original mossberg bird shape grip. It is more comfortable to shoot the shockwave 590 20 gauge.