The Sentry is a remote turret Burn Card that can be deployed in Titanfall: Assault, via regular call-in or by a Sentry Tech. Once deployed, the location of choice will be fortified with a Light Turret.
The Sentry - and its arc and rocket cousins - is an emplacement designed to be set up well ahead of time, not as a reaction. It takes a few seconds to set up, but it's still vulnerable and can be targeted and damaged while setting up. It won't do any good deploying one to protect a Hardpoint when it's already overrun by enemy infantry.
That said, Sentries provide respectable single-target damage and 360-degree coverage that improves if you deploy it at an elevated position. Set it up to protect a Hardpoint you already control (in tandem with other defensive units) or to cover a neutral Hardpoint your Pilots and infantry are on the way to capture. Make sure to refresh any defenses with a new turret if you have the resources to spare, since their health slowly decays over time. It's a good deterrent against man-sized units and a decent distraction against Titans.
Titanfall: Assault Burn Cards
|Pilots||Arc Bruiser • Ash • Boomer (Arc Boomer) • Ghost • Grenadier (Holo Grenadier) • Grunt Capt. • Gunner • Jack Cooper • Pyro Bruiser • Sentry Tech • Sim Ninja • Sniper (Charge Sniper) • Stim Bruiser • Spectre Capt. • Striker|
|Titans||Atlas (Nuke Atlas • Reserve Atlas) • BT-7274 • Ogre (Core Ogre • Mortar Ogre • Reserve Ogre) • Stryder (Reserve Stryder • Smoke Stryder) • Ion (Core Ion • Sniper Ion) • Ronin (Arc Ronin • Core Ronin) • Scorch (Core Scorch • Thermal Scorch )• BT-7274)|
|Burn Cards||Amp Field • Arcfall • Barrage • Drones (Arc Drones • Cloak Drone) • EMP • Grunts (Grunt Blitz • Rocket Grunts • Shield Grunts) • Mine (Arc Mine) • Missile • Nuke • Personal Shields • Reaper Bruiser • Sentry (Arc Sentry • Rocket Sentry) • Spectres (Spectre Depot • Blast Depot • Blast Spectres • Sniper Spectres) • Stalkers • Supply Depot • Time Field|