Ok, so I’ve been thinking about this a while. I found a solution to duel wield a weapon and through a grenade at the same time. take a look
LT: Fire RT: Fire
LB: Through Grenade RT: Melee
Y: Switch
X: Action/Grenade Switch B: Crouch
A: Jump
Lj: Movement/Use Armor Ability Rj: Look/Zoom
D-Pad(symbols example) Up= ^, Down= v, Left= <, Right = >
^
Hide Ordinance Module
<Left Weapon Reload Right Weapon Reload>
Free Action w/ Hidden Module
v