In this how to video, you will learn how to field strip a Ruger p89. First, take out the magazine. Next, put the hammer forward. This will not go forward if the magazine is still inside. Push the slide a centimeter back and push the silver button until it comes out. Once this is done, pull the slide forward and take out the spring and barrel. To re-assemble, place the spring back in the barrel. Make sure the circular piece is facing up. Slide it back on and put the silver bar back through. Make sure the top circular part is aligned with the square bottom part. Put the magazine in. You have now successfully dismantled and re-assembled a Ruger p89.