Xen Sentry Cannon

{{Weapon Infobox
| image=FileXen floor turret brush.jpg|250px
| image2=
| name=Xen Sentry Cannon
| affiliation=
| manufacturer=
| model=
| type=Autonomous gun platform
| damage= 20
| magazine=
| magtype=
| maxammo=
| fire=
| ammotype=Electric discharges
| operation=
| rate of fire=Fast
| recoil=
| spread=
| projectile speed=
| accuracy=Perfect
| range=Long
| maker=
| usedby= Xen
| counterpart=Other CategorySentry weapons|sentry weapons
| counterwep=CategoryExplosives|Explosives
| entity=N/A (func_tanklaser + func_breakable http//developer.valvesoftware.com/wiki/Brush brushes)
| designer=
| hidep=
| hidet=
| hideu=
| hideg=

The '''Xen Sentry Cannon''' is an autonomous cannon encountered only once in ''Half-Life'' between the Mechanized Infantry Repair Bay and the entrance to the Lambda Reactor Complex in Sector F Lambda Complex|Sector F, set up there by the Alien Grunts to guard the entrance to the Reactor Complex.


Unlike most of Xen's bio-technology, the Sentry Cannon appears to be made of some kind of metallic substance, consisting of four long prongs connected to a stationary base, able to pivot in any direction, and shooting a powerful blue energy beam. Its Xen Ceiling Turret|ceiling counterpart fires less powerful electric discharges, and is much smaller.

==Behind the scenes==

Like its ceiling counterpart, the Xen Sentry Cannon is made of http//developer.valvesoftware.com/wiki/Brush brushes tied to the entities "func_tanklaser" and "func_breakable". Like the brush entity "func_tank" used by the HECU Sniper or the Tank (disambiguation)|HECU tanks, "func_tanklaser" is not affected by the console code "notarget". When the cannon is destroyed, it crumbles in the same way a concrete wall would.


FileXen cannon.jpg|The Sentry Cannon in the Lambda Complex.
FileXen floor turret fire.jpg|The same cannon and an Alien Grunt firing at Freeman.

==List of appearances==

*''Half-Life'' {{1st}}

CategorySentry weapons
CategoryXen weapons
CategoryBrush entities

|description=Airboat from Half-Life 2 Beta|''Half-Life 2'' Beta.
|source=Half-Life 2 Beta|''Half-Life 2'' Beta
|other versions=
|cat artist=
|cat subject=CategorySource model imagesCategoryAirboat images
|cat type=CategoryHalf-Life 2 Beta screenshots