I had it removed on my omega. It was shooting 250 shockwaves at 1-2" groups but I the lighter longer bullets tha I wanted to shoot were about 3-4" groups at 100yrd. after removing the QLA it will often shoot under 1" groups. I have even been able to get 1 1/2" inch groups with 135 grains T7 FFF with Knight 250 grain copper BT plastic tip. I had it done by the gunsmith at Jay's in Clare, Mich for $40.