You should now remove the magazine and other parts that you would not like to paint. If you cannot remove a part, apply masking tape to cover it.
MAKE SURE TO TAPE THE ORANGE TIP OF YOUR GUN! It is against the law not to have an orange tip.
Carefully cut around the edges of the tape in order to create a nice edge. Be sure not to cut towards yourself incase your knife slips. Once you have finished taping, you can move outside with your spray paint.