Finding it annoying that this information is not readily available while in the customisation screen, so I decided to post a guide instead of just writing it down for myself.

v0.9

Operator stats:

Grappling Hook (starter equipment)
Limited range, auto-locking (hud indicator)
Speed: 18
Cooldown: 3.2s
*Tip: Hold down shift to maintain some of the momentum from the grapple, if not you will stop and attach to the surface of the object you grappled to.

Afterburner
~2s extra boost
Speed: 12
Cooldown: 6s

Maneuverability Device
~1s extra boost x 3 charges
Speed 15
Cooldown: 7.5s per charge

EMP Grenade
Ammo Capacity: 3/3
Fire Control: manual (launcher must be deployed first)
Description: Launches a ranged projectile that causes a brief stun

HE Grenade
Ammo Capacity: 3/3
Fire Control: manual (launcher must be deployed first)
Description: Launches a ranged projectile with a small explosive

HIVE
Ammo Capacity: 25
Fire Control: lock-on required (can be fired with weapon still in hands)
Description: Launches five seeking missiles at a time, requires clearance above the operator's head (launches upward initially before munition's booster fires and takes over)
*Tip: You know when it can fire because it automatically deploys itself when you have a lock (having it mounted on the right hand pod makes this more obvious, it is easier to see when it is deployed on this side)

Space Sparrow
Ammo Capacity: 3/3
Fire Control: manual (launcher must be deployed first)
Description: Launches a ranged projectile that will either seek onto a locked target or will follow your laser pointer (right click with Sparrow pod deployed)

Probe
Ammo Capacity: 1/2 (these seem to regenerate slowly)
Fire Control: manual (launcher must be deployed first)
Description: ? Launches a ranged projectile and attaches to surfaces, with a red ' T ' and wifi looking symbol.. appears to give you radar lock on enemies?

Motion Sensor
Ammo Capacity: 1/1
Fire Control: manual (launcher must be deployed first)
Description: ? Launches a ranged projectile that attaches to surfaces and shows motion by changing it's HUD icon colour. It starts out blue, and changes to red if motion is detected.

Snapshot Sensor
Ammo Capacity: 1/1
Fire Control: manual (launcher must be deployed first)
Description: Launches a ranged projectile that scans for enemies within a large radius. Right-click to trigger scan before max range is reached.

ADS (Automated Defence System)
Ammo Capacity: 1/1
Fire Control: manual (launcher must be deployed first)
Description: Launches a ranged projectile that attaches a turret to surfaces which can shoot down incoming enemy grenades, within a limited range. Can only have one deployed at a time.

Smoke Launcher
Ammo Capacity: 3/3
Fire Control: manual (launcher must be deployed first)
Description: Launches 3 ranged projectiles in a horizontal spread that create smoke clouds.

EMP Mine
Ammo Capacity: 1/1
Fire Control: manual (launcher must be deployed first)
Description: Launches an EMP mine that attaches to surfaces.

40mm Canon
Ammo Capacity: 15/30
Fire Control: manual (canon must be deployed first)
Description: Fires explosive rounds in bursts of 5

Impulse Grenade
Ammo Capacity: 1/1
Fire Control: manual (launcher must be deployed first)
Description: Launches a ranged-projectile that causes a physical push effect without causing damage. Right-click to detonate early, useful for getting enemies out of cover, or hasty manoeuvres.

MED
Ammo Capacity: 1/1
Fire Control: manual (launcher must be deployed first)
Description: Launches a ranged projectile that attaches to surfaces and provides continuous healing in a small radius over a few moments.

SQUID
Ammo Capacity: 1/2
Fire Control: manual (can be fired with weapon still in hands)
Description: Drops a cloud which obscures visuals around you for a few seconds. Unclear if this breaks radar contact.

Hit Markers

Yellow ' X ' normal hit

Red ' X ' kill

Blue Box armor hit

Hip-fire vs. ADS

-LMGs
get more accurate as you hip fire, slow ADS & reload

-ARs
get less accurate as you hip fire, fast ADS & reload

This is originally from the discussions, posted by @Lilium Atratum. Very useful for the gear that requires a lock-on.

Option to rebind the ping function [Z]...there is a config file...

AppData\Local\ProjectBoundary\Saved\Config\WindowsClient\Input.ini

you want to add/edit the line:

ActionMappings=(ActionName="Mark",bShift=False,bCtrl=False,bAlt=False,bCmd=False,Key=<YOURKEYHERE>)

And additionally from @11.11.11

Rebound to middle mouse click. The specific entry for that is:

ActionMappings=(ActionName="Mark",bShift=False,bCtrl=False,bAlt=False,bCmd=False,Key=MiddleMouseButton) Setting available after april 27 update.

Clearly there are still gaps in this guide. I will continue to fill it out as I unlock stuff (and piece together what it all does) in game.