

This is your standard green 532 nm laser pointer slipped into the space usually occupied by the bolt. I had to add a piece of cardboard to cover the trigger and to use as a lever to press the laser's activation button. Then, point it at the wall (I shot a 15 yard distance with my rangefinder) and adjust the crosshairs as needed. It can't be off any further than if it were boresighted by a gun shop, right?
Once the rain stops, I'll give it a go and see how close I was.
ETA: Fixed images