# Muzzle reference system

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{{Short description|Device used in tank guns}}
{{More citations needed|date=September 2023}}
[[File:Main gun on Challenger 1 tank at Bovington Tank Museum.jpg|thumb|The mirror for the muzzle reference system on this [Royal Ordnance L11](/source/Royal_Ordnance_L11) is inside the metal housing on top of the [thermal sleeve](/source/thermal_sleeve).]]
A '''muzzle reference system''' ('''MRS''') is a device used on most modern [tank](/source/tank) guns and some [artillery](/source/artillery) systems that measures the bending of the barrel due to heat, gravity and other issues. It normally consists of a [laser](/source/laser) device and detector mounted at the breach end of the gun, often co-located with other optics like the gunner's sight, and a mirror at the muzzle. By measuring the deflection of the barrel, corrections can be applied by the [ballistic computer](/source/ballistic_computer) to correct for changes as the gun is fired.

==Static muzzle reference system (SMRS)==
{{Empty section|date=December 2023}}

==Dynamic muzzle reference system (DMRS)==
{{Empty section|date=December 2023}}

==See also==
*[Thermal sleeve](/source/Thermal_sleeve)

==References==
* {{cite journal
 |first1= Tolga |last1= Dursun
 |first2= Firat |last2= Buyukcivelek
 |first3= Çağrıhan |last3= Utlu
 |title=A review on the gun barrel vibrations and control for a main battle tank
 |journal= Defence Technology
 |date=May 2017
 |volume= 13
 |issue= 5
 |pages= 353–359
 |doi= 10.1016/j.dt.2017.05.010
|doi-access= free
 }}

==External links==
{{Commons category|Muzzle reference systems}}

Category:Ballistics

{{mil-stub}}

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Adapted from the Wikipedia article [Muzzle reference system](https://en.wikipedia.org/wiki/Muzzle_reference_system) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Muzzle_reference_system?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.