View source for SIG Sauer SIGM400

{{Infobox weapon
| name               = SIG Sauer SIGM400 series
| image              = Sig_Sauer_M400_rifle.jpg
| image_size         = 300
| caption            = Sig Sauer M400 series rifle
| origin             = [[United States]]
|type=[[Semi-automatic rifle]]<br />[[Carbine]]
| is_ranged          = yes
| service            = 2010–Present
| used_by            = See [[#Users|Users]]
| wars               = [[War in Iraq (2013–2017)]]<br />[[Islamic State insurgency in Iraq (2017–present)]]
<!-- | assembler          = [[Robert Hirt]] -->
| design_date        = 2000s
| manufacturer       = [[SIG Sauer]]
| production_date    = 2010–Present
| number             =
| variants           = <!---Classic<br />Hunter Black<br />Enhanced<br />Enhanced FDE<br />Enhanced OD Green<br />SRP<br />SWAT<br />Predator <br />Varminter--->
| weight             = {{convert|7.6|lb|kg}}
| part_length        = {{convert|14.5|–|20|in|cm}} (5.56×45mm)<br />{{convert|9|–|16|in|cm}} (.300 AAC)
| cartridge          = [[5.56×45mm NATO]]<br />[[.223 Remington]]<br />[[.300 AAC Blackout]]
| action             = [[Direct gas impingement system]], [[rotating bolt]]
| velocity           =
| range              =
| feed               = [[STANAG magazine]]s
| sights             =
}}
The '''SIGM400''' is a family of firearms manufactured by [[SIG Sauer]].<ref>{{cite web |url=https://www.sigsauer.com/products/firearms/rifles/sigm400/ |title=SIGM400 |publisher=SIG Sauer}}</ref> The M400 is an air-cooled, [[direct impingement]] [[Gas-operated reloading|gas-operated]], magazine-fed [[carbine]] that is based on the earlier [[AR-15]] rifle.<ref name="Gunsmagazine-SigM400">{{cite web|title=SIG SAUER's M400 Predator|url=http://gunsmagazine.com/curtail-those-coyotes/|website=gunsmagazine.com|accessdate=27 February 2017}}</ref> Depending on the variant, it can be chambered for [[5.56×45mm NATO]] or [[.300 AAC Blackout]] cartridges, and may have a fixed or [[telescoping stock]].<ref name="SigSauer-M400 Predator">{{cite web|title=SIGM400 Predator|url=https://www.sigsauer.com/store/sigm400-predator.html|website=sigsauer.com|accessdate=27 February 2017|url-status=dead|archiveurl=https://web.archive.org/web/20170228081848/https://www.sigsauer.com/store/sigm400-predator.html|archivedate=28 February 2017|df=dmy-all}}</ref>
==Design details==
===Operating mechanism===
The SIGM400 is a [[semi-automatic firearm]] in either [[rifle]] as the '''SIGM400 Classic, SRP, Tread, Elite,''' '''Predator''' or [[pistol]] as the '''Elite PSB''', intended for law enforcement, military and civilian markets. It fires from a [[closed bolt]] and uses a [[direct impingement]] gas system.<ref name="SigSauer-M400 Predator"/>
===Features===
The SIGM400 Predator is a rifle while the SIGPM400 Elite PSB is a pistol. The rifles are chambered for either [[5.56×45mm NATO]] with {{convert|14.5|in|cm|adj=on}}, {{convert|16|in|cm|adj=on}}, {{convert|18|in|cm|adj=on}}, or {{convert|20|in|cm|adj=on}} barrels threaded 1/2x28, or chambered for [[.300 AAC Blackout]] with {{convert|9|in|cm|adj=on}} or {{convert|16|in|cm|adj=on}} barrels which are threaded 5/8x24 for muzzle devices such as [[Silencer (firearms)|sound suppressor]]s. There are California compliant ("[[Featureless rifles|featureless]]") models for both.<ref name="SigSauer-M400 Predator" /> The .300 AAC Blackout model is tailored specifically for efficient use with suppressors. The [[Picatinny rail]] supports optical, electro optical, or iron sights. SIG Sauer also manufactures suitable suppressors.
The SIGPM400 Elite PSB pistol is chambered for 5.56×45mm NATO with an {{convert|11.5|in|cm|adj=on}} barrel and is chambered for .300 AAC Blackout with a {{convert|9|in|cm|adj=on}} barrel. Both use a Pistol Stabilizing Brace accessory.<ref name="SigSauer-M400 Predator"/>
[[File:SIGM400 Users.png|thumb|A map with users of the SIGM400 in blue]]
==Users==
* {{BRA}} [[Civil Police of Rio de Janeiro State]]<ref>{{Cite web|url=https://oglobo.globo.com/rio/noticia/2023/07/08/conheca-os-novos-fuzis-da-policia-civil-do-rio.ghtml|archiveurl=https://web.archive.org/web/20230712202403/https://oglobo.globo.com/rio/noticia/2023/07/08/conheca-os-novos-fuzis-da-policia-civil-do-rio.ghtml|url-status=live|title=Conheça os novos fuzis da Polícia Civil do Rio|date=8 July 2023|archivedate=12 July 2023|website=O Globo}}</ref>
* {{EGY}}: [[Sa'ka Forces|Egyptian Special Forces Sa'ka, Navy Sa'ka And paratroopers]]
* {{IRQ}}: [[Iraqi Special Operations Forces]] use the SIG Sauer M400.<ref>{{Cite web|url=https://armamentresearch.com/isof-arms-equipment-part-1-personal-equipment/|title=ISOF Arms & Equipment Part 1 – Personal Equipment |work= [[Armament Research Services]] (ARES)|date=27 November 2016}}</ref>
* {{OMN}}: [[Sultan of Oman's Armed Forces|Oman Military]] use the SIG Sauer M400.<ref>{{Cite web|url=https://nationalinterest.org/blog/buzz/ultimate-ar-15-rifle-all-time-67792/|title=Is This the Ultimate AR-15 Rifle of All Time?|date=20 July 2019}}</ref>
* {{PHL}}: [[Philippine Army]] used as a Designated Marksman Rifle.<ref>{{cite web | url=https://www.phdefresource.com/2023/10/ord-pabac2-005-24-carbine-556mm-assault.html | title=ORD PABAC2-005-24 Carbine, 5.56mm Assault Rifle 15 Platform Acquisition Project of the Philippine Army }}</ref><ref>https://armyrecognition.com/defense_news_december_2023_global_security_army_industry/philippines_army_to_enhance_accuracy_with_new_7.62mm_marksman_rifles.html {{Bare URL inline|date=August 2024}}</ref>
* {{USA}}: [[US Military]], [[Philadelphia Police Department]],  [[Detroit Police Department|Detroit Police Department SWAT]],  [[Franklin County, Ohio|Franklin County, Ohio Police Department]],  [[California Highway Patrol]], [[Indiana State Police]], [[Vermont State Police]], [[Virginia State Police]] use the SIG Sauer M400.<ref>{{Cite web|url=https://www.thefirearmblog.com/blog/2019/01/03/philadelphia-swat-adopts-sig-sauer-m400-pro-rifles/|title = Philadelphia SWAT Adopts SIG SAUER M400 Pro Rifles -|date = 3 January 2019}}</ref><ref>{{Cite web|url=https://www.guns.com/news/2018/09/19/detroit-swat-picks-sig-sauer-m400-in-rifle-contract/|title = Detroit SWAT picks Sig Sauer M400 in rifle contract}}</ref>
==See also==
*[[Heckler & Koch HK416]]
*[[SIG Sauer SIG516]]
*[[SIG MCX]]
*[[M4 carbine]]
==References==
{{reflist|30em}}
{{Use dmy dates|date=June 2017}}
{{ArmaLite AR-10 derivatives}}
{{SIG Sauer Rifles}}
[[Category:.300 BLK firearms]]
[[Category:5.56×45mm NATO semi-automatic rifles]]
[[Category:Assault rifles of Germany]]
[[Category:Assault rifles of the United States]]
[[Category:Semi-automatic rifles of the United States]]
[[Category:SIG Sauer rifles]]
[[Category:AR-15 style rifles]]
[[Category:Weapons and ammunition introduced in 2010]]