how do you BXR or Double Shot In halo 3?

[JR g]

dont give bs plz..... i really have been trying to figure this out i got the bxb down i just need the rest.
dont give bs plz..... i really have been trying to figure this out i got the bxb down i just need the rest. thanks to everyone who answered.
o and im not thinking about h2 definitly h3 but thanks for helping
lawl. to last reply u dont have to mod a controll u just need to push the b button and the x button than the r trigger its common on halo 2.

 

[mark12u]

Neither can be done in Halo 3... sry man. They fixed it. You can however, throw a grenade imediately after a punch or during the middle of a reload, but I doubt that helps any. Sry