As a new player, of course you will like to expericence all sort of weapon. This build allows you to use all sorts of primary and secondary weapon. But assault rifle, sniper rifle and sub-machine gun are more prefered with this skill set. Here are some example:

M308 rifle
As a DMR, it has high damage output and low ammo capacity
Even without any mod on it, it is pretty good
Prefered to be use in single fire mode
Remember to reload
Chicago typerwriter smg
It has a large magazine and high total ammo capacity
Allows you to spray at the cops
Electrical Brass Knuckles
You can now stun enemy
"I tase the taser"
Concussion grenade
Stun enemy again
And of course, use whatever you like.

First-aid-kit a.k.a medkit

Allows you to revive your teamate by simply yelling at them
Allows you to bring 14 medkits
Allows you/your teamates automatically use the medkits deployed on the floor when they are out of hp (20 sec cool down, 5 meter range)
Allows you to do more damage to enemy specials
Allows you to convert 2 cops to fight for you
(How to intimidate: check out tutorial in crime .net, bottom left corner, The basics, loud)
Gives you bonus damage and defence during close quaters combat
Allows you to wear the heaviest armor a.k.a ICTV
Allows you to deal with shield more easily
Extra ammo every 6 cops you eliminate
Allows you to fix drill faster
Gives extra accuracy and stability for your weapon
Allows you to run faster and last longer
Allows you to avoid some damage when you are sprinting (but usually you won't notice it)
Allows you to run even faster when you break your armor (5 sec duration)
Gives you more resistance when receiving enemy's melee attack (it really hurts without it)

Doctor bag of course...
Allows you to revive your teamate by simply yelling at them
Allows you to bring 2 doctor bag with 4 uses each (2 x 4 = 8)
I have another guide explaining differences between doctor bag and medkit, link are listed at the bottom of this guide
Allows you to do more damage to enemy specials
Allows you to convert 2 cops to fight for you
(How to intimidate: check out tutorial in crime .net, bottom left corner, The basics, loud)
Gives you bonus damage and defence during close quaters combat
Allows you to wear the heaviest armor a.k.a ICTV
Allows you to deal with shield more easily
Extra ammo every 6 cops you eliminate
Allows you to fix drill faster
Gives extra accuracy and stability for your weapon
Allows you to run faster and last longer
Allows you to avoid some damage when you are sprinting (but usually you won't notice it)
Allows you to run even faster when you break your armor (5 sec duration)
Gives you more resistance when receiving enemy's melee attack (it really hurts without it)

Ammo bag
Allows you to do more damage to enemy specials
Allows you to convert 2 cops to fight for you
(How to intimidate: check out tutorial in crime .net, bottom left corner, The basics, loud)
Gives you bonus damage and defence during close quaters combat
Allows you to wear the heaviest armor a.k.a ICTV
Allows you to deal with shield more easily
Gives you alot more ammo
Allows you to slowly get back your throwables from ammo pick up
(red ammo box dropped by enemy)
Allows you to deploy 2 extra large sized ammo bag
Allows you to fix drill faster
Gives extra accuracy and stability for your weapon
Allows you to run faster and last longer
Allows you to avoid some damage when you are sprinting (but usually you won't notice it)
Allows you to run even faster when you break your armor (5 sec duration)
Gives you more resistance when receiving enemy's melee attack (it really hurts without it)

Put this on!

Based on your own play style, pick the one you like
+80% health
Regenerate 3% hp every 5 sec
Have a chance to stun enemy when you shoot
+15% more likely to be targeted because you are a tank
+35% armor
+20% armor regen rate (reduce the cool down)
+10% armor regen rate for your teammate
2 sec of invicibility when your armor breaks (15 sec cool down)
If you find this guide helpful, feel free to share with others
And you can find out more of my guide here!