How to lower your weapon in halo 4!

I recently discovered that by doing a bunch of button combinations on halo 4 can make you lower your weapon like in the machinima’s (Eg: Red vs blue) to do this you must first press the reload button (and hold) then the jump button and finally the button to crouch. So i have to hold down X,A and B with my control layout. Hold these three down and press and hold the bottom arrow on the D pad. Hold all of these in this order for about 3 seconds and your weapon has been lowered! Hope it helps ;D -Darkvoid214232

Can I do this in Forge and Customs?

This was discovered a while ago.