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| {{Era|H2|H3|GOO|UP|CH}} | | {{Status|Canon}} |
| | [[File:Ammo_-SMG.png|100px|thumb|A 5×23mm Caseless FMJ from ''[[The Art of Halo 3]]''.]] |
| | The '''M443 Caseless Full Metal Jacket''' ('''M443 Caseless FMJ''') is a type of 5×23mm projectile ammunition used in the [[M7 Caseless Submachine Gun]] and [[M7S Caseless Submachine Gun|its suppressed variant]].{{Ref/Site|URL=http://halo.bungie.net/projects/halo3/content.aspx?link=h3smg|Site=Bungie.net|Page=The M7 / Caseless SMG|D=24|M=01|Y=2021|LocalArchive=Machines, Materiel and Munitions from the Human-Covenant Conflict, 2525 - Present/M7}}<ref>'''[[Halo 3: ODST]]'''</ref> |
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| The ''5x23mm'' '''M443 Caseless Full Metal Jacket''' (abbreviated '''M443 Caseless FMJ''') is a type of .197-caliber projectile ammunition used by the [[United Nations Space Command]] in their [[M7 Caseless Submachine Gun]] <ref>''[[Halo 3]]''</ref>.
| | == Overview == |
| | This ammunition is classified as "caseless", meaning it does not have a metallic casing surround the powder and sealing the bullet, propellant, and primer together. Instead of using this casing, the round uses a combustible adhesive to seal these components together. Because the chemical "casing" is vaporized when fired, there is no need to eject spent brass shell casings. |
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| ==Background==
| | This feature is very beneficial. It reduces friction inside the magazine, one of the main causes of jamming in weapons. It also negates the need to expel brass casings, which also is a major cause of jamming, as mentioned above. |
| This ammunition is classified as "caseless," meaning it does not have a metallic casing surround the powder and sealing the bullet, propellant, and primer together. Instead of using this casing, the round uses a combustible adhesive to seal these components together. Because the chemical "casing" is vaporized when fired, there is no need to eject spent brass shell casings. | |
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| This feature is very beneficial. It reduces friction inside the magazine, one of the main causes of jamming in weapons. It also negates the need to expel brass casings, which also is a major cause of jamming, as mentioned above.
| | By a stroke of luck, this is important to a user wielding two M7s at once, such as a [[Spartan]], who would not want to have hot brass flying in their face from the eject port of the weapon in their left hand. The projectile itself is "jacketed," or coated, in metal (possibly copper or steel) to aid in penetration of the target. "Caseless" rounds are actually embedded into the block of propellant, reducing their length, allowing more ammo to be stored in a smaller space. |
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| | ==Trivia== |
| | Real caseless weapons suffer from problems with "[[wikipedia:cooking off|cooking off]]", which is when incredible temperatures result in a cartridge firing unintentionally. Since there is nothing insulating the combustible material from the heat (one of the uses of a brass casing), even regular temperatures in the firing could result in the cartridge going off, leading to damage to the weapon, possibly even the user, or even the weapon accidentally firing. The main way to prevent cooking-off in caseless weapons is by [[wikipedia:electronic firing|electronic firing]], but this system requires a battery, which may not be in constant supply in the battlefield. However, it could simply use a High Ignition Temperature Propellant, similar to the 1980s prototype G11 assault rifle. |
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| This is important, as a user wielding two M7s at once would not want to have hot brass flying in his face from the eject port of the weapon in his left hand. The projectile itself is "jacketed," or coated, in metal (possibly copper or steel) to aid in penetration of the target. Caseless rounds are actually embedded into the block of propellant, reducing their length, allowing more [[ammo]] to be stored in a smaller space.
| | ==Gallery== |
| | <gallery> |
| | File:M443 packet.png|M443 C-FMJ ammo packet. |
| | File:H2A M7S Magazine.jpg|thumb|The magazine of an [[M7S SMG|M7S submachine gun]] in ''[[Halo 2: Anniversary]]'' multiplayer, containing 5x23mm caseless ammunition. |
| | </gallery> |
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| ==Related Articles== | | ==List of appearances== |
| *[[United Nations Space Command]] | | *''[[Halo: First Strike]]'' {{1st}} |
| *[[M7 Caseless Submachine Gun|M7/Caseless Submachine Gun]] | | *''[[Halo 2]]'' |
| *[[M7S Submachine Gun|M7S Caseless Submachine Gun]] | | *''[[Halo: The Graphic Novel]]'' |
| | **[[Armor Testing]]'' |
| | *''[[Halo: Ghosts of Onyx]]'' |
| | *''[[Halo: Uprising]]'' |
| | *''[[Halo 3]]'' |
| | *''[[Halo: Contact Harvest]]'' |
| | *''[[Halo: The Cole Protocol]]'' |
| | *''[[Halo Wars]]'' |
| | *''[[Halo: Helljumper]]'' |
| | *''[[The Life]]'' |
| | *''[[Halo 3: ODST]]'' |
| | *''[[Halo Legends]]'' |
| | **''[[Prototype]]'' |
| | **''[[The Package (animated short)|The Package]]'' |
| | **''[[Origins]]'' |
| | *''[[Halo: Evolutions - Essential Tales of the Halo Universe]]'' |
| | **''[[Dirt]]'' |
| | *''[[Halo: Blood Line]]'' |
| | *''[[Halo: Spartan Assault]]'' |
| | *''[[Halo 2: Anniversary]]'' |
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| ==Sources== | | ==Sources== |
| <references/>
| | {{Ref/Sources}} |
| {|style="margin:0 auto;padding:0 auto" align=center id=toc | |
| !align=center bgcolor=#6699CC colspan=3|<font color="white">List of '''[[UNSC|<span style="color: white;">UNSC</span>]] Infantry Weapons'''</font>
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| |align=left|[[Pistol]]s and [[Submachine Gun|SMGs]] || ||[[M6 series]] ([[M6C Magnum Sidearm]] · [[M6D Personal Defense Weapon System]] · [[M6G Personal Defense Weapon System]] · [[M6J Carbine]]) · [[M7/Caseless Submachine Gun]] · [[M7S Submachine Gun]]
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| |align=left|[[Assault rifle]]s and carbines || ||[[MA5 Series]] ([[MA5B Individual Combat Weapon System|MA5B Assault Rifle]] · [[MA5C Individual Combat Weapon System|MA5C Assault Rifle]] · [[MA5K Carbine]]) · [[MA3 Assault Rifle]] · [[MA2B Assault Rifle]] · [[BR55 Battle Rifle]] · [[BR55HB SR Battle Rifle]]
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| |align=left|[[Shotgun]]s || ||[[M90 Close Assault Weapon System|M90 Shotgun]]
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| |align=left|[[Sniper rifle]]s || ||[[Sniper Rifle System 99C-S2 Anti-Matériel|SRS99C Sniper Rifle]] · [[Sniper Rifle System 99D-S2 Anti-Matériel|SRS99D Sniper Rifle]]
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| |align=left|[[Rocket launcher]]s || ||[[M19 SSM Rocket Launcher|M19 SSM Rocket Launcher]] · [[M19-B Surface-to-Air Missile Launcher|M19-B SAM Missile Launcher]] · [[M41 SSR MAV/AW]]
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| |align=left|[[Machine Gun]]s and [[support weapon]]s || ||[[AIE-486H Heavy Machine Gun]] · [[M247 General Purpose Machine Gun]] · [[NA4 Flamethrower]] · [[M7057/Defoliant Projector]] · [[LAU-65D/SGM-151|LAU-65D/SGM-151 Missile Pod]] · [[Weapon/Anti-Vehicle Model 6 Grindell/Galileian Nonlinear Rifle]]
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| |align=left|[[Grenade]]s and explosives || ||[[102mm High-Explosive Anti-Tank|102mm HEAT]] · [[C-7 Foaming Explosive]] · [[C-12 Shaped Charge]] · [[Fougass]] · [[M9 High-Explosive Dual-Purpose Grenade|Fragmentation Grenade]] · [[M383C Linear Shaped Charge Demolition Kit|M383C Demolition Kit]] · [[Napalm Grenade]] · [[Satchel Charge]] · [[Smoke Grenade]] · [[Sonic Grenade]] · [[Thermite-Carbon Cord]] · [[Thermite Grenade]]
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| |align=left|[[Ammunition]] used || ||[[M225 Semi-Armor-Piercing High-Explosive|M225 SAPHE]] · [[12.7x99mm Armor-Piercing|12.7x99mm]] · [[14.5x114mm]] · [[.390|0.390 caliber]] · [[.450|0.450 caliber]] · [[7.62x51 NATO|7.62x51mm NATO]] · [[M634 Experimental High-Powered Semi-Armor-Piercing|9.5x40mm M634 X-HP-SAP]] · [[MUTA-AP-09334]] · [[M443 Caseless Full Metal Jacket|M443 Caseless FMJ]] · [[Soellkraft 8 Gauge Shell]]
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| |}
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| [[Category:UNSC]]
| | {{Ammunition}} |
| [[Category:Technology]]
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| [[Category:Ammunition]]
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