Was parusing thru Wally World looking for aprearantly non exsisting Rem Gold Bullet .22's and found a BSA laser sight for $20. I was wanting something to put on the Walther P22 to practice dry firing with (I put a piece of foam ear plug tween the hammer and fireing pin) to check my trigger pull. Well if ya got a lazer on your gun,you might as well shoot it. So the SIL and I tried it out on some map CD's and this thing is neat. Zero'd in quick and easy and is a pretty fun lil gizmo. Held aim for 300+ rounds. It has the pressure switch included but didn't mount it on the gun as the button on the lazer is close to your weak hand. Also comes with a Weaver mount base that could be fitted on a bow or something or other. The fit on the gun isn't as neat and compact as the lazer made for the P22 but for $100 less it is just fine.