No need for a laser to boresight. Pull the bcg out of the upper, place it in a solid rest, look down the bore and center it on the bullseye. Your eye will naturally align with the bore much like it does a peep sight.
Once the bore is centered on the bullseye look through the sight without moving the upper and see where the reticle is compared to the bore. If the reticle is high and right you will need to turn the elevation/windage knobs in the opposite direction as normal. So, for a high and right reticle you will need to turn the elevation knob in the up direction. Then turn the windage knob in the direction for a right movement.
If I am sighting the rifle in at 50 yards I will do this with a 50 yard target. I normally start with the sight 1-2 inches above whatever the bore is centered on. This should cause your first shots to go a little low. My thinking is of it is too low you will at least see it hit the dirt instead of missing the burn and not having a clue. However, I haven't ever had one start that low.
This can be done with any rifle that the bolt can be removed and the bore sighted through. Good luck. Its really easy.