# Sealed round

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{{Short description|Munition stored ready-to-use in a container}}
{{More citations needed|date=October 2024}}
A '''sealed round''' is a [munition](/source/munition) which is typically stored in some kind of container (usually a cylinder or box, but the container may in fact be the outside of the munition), so that the munition does not require any sort of maintenance and is stored in this container until use. The advantage of this type of system is that such munitions can be stored for long periods without needing to be periodically checked and possibly repaired. Typically these, like all munitions, still do have a shelf life&mdash;but it is often quite long. [Bullets](/source/Bullets)-based [cartridges](/source/Cartridge_(firearms)) have been sealed rounds (in particular Captive-piston ammunition)<ref>{{Cite web | url=https://forum.cartridgecollectors.org/uploads/short-url/fzVtp4hgUeSpxgQ2lFOFsh6TQrg.pdf | title=303 Colby Silent Cartridge and Pistol. Captive Piston | date=1944-05-17 | website=forum.cartridgecollectors.org}}</ref><ref>{{Cite web| title=Frankford arsenal - Silent weapon system cartridge design and development | url=https://apps.dtic.mil/sti/pdfs/AD0334799.pdf | archive-url=https://web.archive.org/web/20230616183650/https://apps.dtic.mil/sti/pdfs/AD0334799.pdf | archive-date=2023-06-16}}</ref><ref>{{Cite web | title=POTD: Silent Piston Cartridge 7.62x42 - The Firearm BlogThe Firearm Blog | date=May 2017 | url=https://www.thefirearmblog.com/blog/2017/05/01/potd-silent-piston-cartridge-7-62x42/ | archive-url=https://web.archive.org/web/20170504100747/http://www.thefirearmblog.com/blog/2017/05/01/potd-silent-piston-cartridge-7-62x42 | access-date=2025-08-14 | archive-date=2017-05-04 | url-status=live }}</ref> ever since the cartridge case was invented.

==Anti-aircraft missiles==
Many [surface-to-air missiles](/source/surface-to-air_missiles) (SAMs) and [air-to-air missiles](/source/air-to-air_missiles) (AAMs), which are traditionally very maintenance-intense systems, are moving to this type of system.  Examples of modern missile systems which feature sealed rounds include:thumb|S-300 cutaway exhibit
*[MIM-104 "Patriot"](/source/MIM-104_Patriot) SAM
*[S-300P](/source/SA-10_Grumble) ([SA-10 "Grumble"](/source/SA-10_Grumble)) SAM
*[S-300V](/source/SA-12_Gladiator%2FGiant) ([SA-12 "Gladiator"](/source/SA-12_Gladiator%2FGiant)/["Giant"](/source/SA-12_Gladiator%2FGiant)) SAM
*[9M33M2/3 "Osa-AKM"](/source/SA-8_Gecko) ([SA-8B "Gecko"](/source/SA-8_Gecko)) SAM<ref>{{citation |title=9K33 Osa (SA-8 Gecko) Russian 6x6 Amphibious Short-Range Tactical Surface-to-Air Missile System |url=https://odin.tradoc.army.mil/WEG/Asset/3c1367f4d86f7a05e55afeebc6a1cef4 |publisher=US Army |work=Worldwide Equipment Guide}}</ref>
*[AIM-54C ECCM/Sealed "Phoenix"](/source/AIM-54_Phoenix) AAM
The MIM-104, S-300P and S-300V missiles are stored in cylinders, which they are ejected out of upon launch. The 9M33 missiles are stored in boxes in the factory and launched out of them. The AIM-54C missiles are not stored in any kind of container, but are sealed unlike the earlier AIM-54A and AIM-54B which exchanged fluids with the host aircraft. In this case, the advantage of low maintenance has been exchanged for the disadvantage of lower capability, but this is not the case with the other examples.

==Anti-tank weapons==
thumb|Cross section of M72 LAW
Many infantry anti-tank weapons use sealed rounds; some&mdash;such as the US [M72 LAW](/source/M72_LAW), the Russian [RPG-18](/source/RPG-18) and the Swedish [AT4](/source/AT4)&mdash;also use the container as the launcher, so that the whole system is discarded after firing.

==See also==
*[List of established military terms](/source/List_of_established_military_terms)
*[Glossary of firearms terms](/source/Glossary_of_firearms_terms)
*[Glossary of British ordnance terms](/source/Glossary_of_British_ordnance_terms)

==References==
{{reflist}}

{{Firearms}}

{{DEFAULTSORT:Sealed Round}}
Category:Ammunition

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