Break the gun in half, rotate the safety halfway between safe and fire.
Use a punch that fits the hole on the non thumb lever side and punch the safety out.
You should now have the safety in your hand or on the table. Look in the right side hole and observe the silver pin sticking up through the opening.
Position safety on the opposite side it started on, and while using a small something (flat bladed screwdriver) to depress the silver pin, push the safety back through at the same halfway between fire and safe angle.
Re assemble the rifle, and congrats, you now have reversed your safety!
I did this on mine, makes it easy for a lefty to shoot.
And yes, it has a mag release on both sides.