I have Neil’s LDC’s on 4 of my air rifles and can say his quality is second to none. He made me a reflex-style thread-on/over LDC for my .177 S510 Carbine, based on my specs/needs and a couple design discussions. Using that LDC the shot is completely quieted, and the only thing you hear are the mechanicals when you pull the trigger. A couple pics of that are on the customers guns page. I also have a standard thread-in one on my 22 Wildcat that is super effective, again built to my purpose/needs. I wouldn’t hesitate to endorse his products.