I ordered the "yellow" one but was sent this one by mistake. I was going to return it but after reading the reviews here decided to keep it. It works great. It is very accurate and easy to use. I added some velcro straps on the side to keep it attached to the barrel. It reads just as fine if it is hanging upside down by the way. And then I made another velcro thing to keep the button pushed when I need it. It took about half hour but eliminated the main flaw with the this chronograph and it works great for me now. If the manufacturer improves the design to be able to attach to the marker and adding an on/off switch this chronograph will be perfect.
