You need 5 pieces rolled to Stamina and 1 piece rolled to Firearms....
Which piece of gear you choose to be your only Firearms rolled piece is entirely up to you... It does not matter which one you choose as long as only 1 piece is rolled to Firearms.
Then all Gear Mods will be Stamina.... This will get you to 9K Stamina without wasting extra points that could be used in another category like Firearms or Electronics.
The precision talent will get you to the 50% crit chance and that's all you need... FORGET ABOUT VICIOUS!!!!!!!!!!!!!
The LVOA and the Lightweight M4 are the same, the recoil is a little different so it's purely up to you and which one feels better when you shoot it.
DETERMINED MUST BE IN THE LAST SLOT OF YOUR SECONDARY WEPON AND PISTOL!!!!!! THIS WILL GET YOUR SUPER AND SKILLS BACK VERY FAST....IT'S A GAME CHANGER!!!