Sentries

This page contains information on all sentries present in Helldivers 2, including: A/MG-43 Machine Gun sentry, A/G-16 Gatling sentry, A/AC-8 Autocannon sentry, A/MLS-4X Rocket sentry, A/M-12 Mortar sentry, A/M-23 EMS Mortar sentry, A/ARC-3 Tesla Tower
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==General Tips==
Every sentry has a lifetime of 180 seconds. Past this time, it will go underground regardless of how much ammunition is left in it.
When picking your sentry, keep mission type in mind:
*For defence mission consider taking EMS Mortar and some close-range sentries. It may be harmful to bring Mortar Sentry as on such missions there is not plenty of space to run around and kite; on extraction type missions citizens can easily get under its fire.
*For operations on Terminid front close-range and horde-oriented sentries could come in handy, so consider bringing Gatling Sentry, Autocannon or Tesla Tower.
*On Automaton front enemies you will have to deal with are much slower but tougher at the same time. As such, consider taking Rocket Sentry or Mortar Sentry with you. You could also bring Shield Generator Relay and use it to cover your sentries.
*Heavy-armored units will typically prioritize the destruction of nearby sentries over all other threats, it is recommended to focus on them as most heavies can instantly destroy a sentry with a single attack. This however, can be turned to your advantage by turning the sentry into a distraction or lure.
==Available Upgrades==
Engineering bay:
*Synthetic Supplementation - Cooldown time for sentries reduced by 10%.
*Advanced Construction - Health of sentries increased by 50%.
*Rapid Launch System - Tesla Tower's call-in time is negated.
*Circuit Expansion - Arcs from Tesla Tower jump to one additional enemy.
Robotics Workshop:
*Dynamic Tracking - Deployment time for all turret sentries is reduced to 3 seconds.
*Shock Absorption Gel - Ammo for Sentry stratagems is increased by 50%.
*High-Quality Lubricant - Increases sentries rotation speed:
**Machine Gun and Gatling Sentries - by 66%.
**Autocannon and Rocket Sentries - by 50%.
*Blast Absorption - Increases explosive damage resistance by 50%.