Hallo.. I need some help guys. I won’t to buy a DonnyFl sumo silencer for my impact. I have a Air Arms Q-TEc silencer on my Brocock Bantam. So I put it on the impact for a test and there was no difference in sound level. I open the Fx silencer and it’s a open tube. Yes a open tube. How is this possible. And one more question.... will the Sumo be quieter. My gun is .22 and the Q-TEc is in .22.