halo reach, how to shoot the grenade launcher

halo reach has a lot of new weapons. Among those new weapons is the grenade launcher. It looks like this  and shoots in a very interesting manner. it has two different firing modes, tap the fire button once at the grenade will blow up on contact of another player shoot it and hold down the fire button and it won't blow up until you let go

of the fire button. And the features of this gun doesn't stop there, when you hod the fire button down when it blows up it will also let off an E.M.P wave disabling any vehicles or shields it hits, so that alone gives you lots of options for this awesome gun. usually it will not kill the person you shoot and will only take there shields down, so once there shields are down you should switch to another weapon like a D.M.R or pistol, so always make sure to keep one of those weapons at hand at all times when using this gun   

full guide to: D.M.R:    http://haloreachskillz.blogspot.com/2010/11/halo-reach-dmr-tips.html

full guide to the pistol:  http://haloreachskillz.blogspot.com/2010/11/how-to-use-halo-reach-pistol.html