Different ammo types

Just what the the title says. Use different ammo types such as AP rounds, shredder rounds, etc. Type can be changed using the D-pad maybe. Different ammo type may do better on certain enemies. Say use shredder rounds on a drone or a Jackal. AP rounds on Brutes and Elites, Standard rounds for what ever the hell you feel like. Probably just use it for campaign and firefight.

even if it is limited to campaign/firefight, it still fells a little too gimmicky

has some good potential though,
i would say to have anti-shield rounds and anti-armor rounds

but if it were added to a weapon, make it a NEW weapon, adding new things to old weapons just isn’t cool

What’s AP and Shredder? The size and damage or something?

Its a good idea, don’t get me wrong, but I couldn’t see it working in Halo.

Absolutely not!

I fell in love with the Halo games all those years ago due to the character, depth, yet simplicity that Bungie gave to them. Whilst I’m sure 343i will hopefully do a good job, I hope they don’t change the formula that Bungie had perfected (especially in Halo 2 or 3). Changing the dynamics of the game too much won’t make it Halo any more.

Well, i dont know about yourself, but change happens to everything, i dont think Halo 4 will go back retro now, it has so much it can use.
(New engines ect)

I don’t know… Different ammo types is great and all in RPG or RPG-style games like Mass Effect, but in Halo it would just add another unnecessary addition that would probably not be used as much as it could due to unneeded complexity.

In plus, sometimes simple is better.