A great product. I mounted it on scope of an air rifle. It lets me go rabbit shooting on my own at night. As the picture shows, the torch barrel has to be a similar diameter to the scope. I have my torch on the side and down a bit so I can fit the air rifle through the narrow door of the gun safe. That works well. Looks so cool too. It is has a strong grip with no change of movement. My torch has internal batteries, so isn't very powerful. I image it would work well on a .22 (or bigger) with a more powerful torch that has external batteries.
Good solid item with great clearance for larger scopes, needs a bit of packing on larger diameter torches such as the led lenser M14, would be excellent on P7 or similar, simple to use.
This works nicely with both my rifle and hunting bow.