Engineering:SIG Sauer SIGM400
| SIG Sauer SIGM400 series | |
|---|---|
 Sig Sauer M400 series rifle | |
| Place of origin | United States |
| Production history | |
| Designed | 2000s |
| Manufacturer | SIG Sauer |
| Produced | 2010–Present |
| Specifications | |
| Mass | 7.6 lbs |
| Barrel length | 14.5 - 20 inches |
| Cartridge | 5.56×45mm NATO .223 Remington .300 AAC Blackout |
| Action | Direct gas impingement system, rotating bolt |
| Feed system | AR compatible magazine |
The SIGM400[1] is a family of firearms manufactured by SIG Sauer. The M400 is a 5.56×45mm NATO, air-cooled, direct impingement gas-operated, magazine-fed carbine. It has a 14.5 to 18 inches barrel (depending on the variant) and a telescoping stock. The rifle is based on the earlier AR-15 rifle.[2][3]
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 gas impingement system.[2]
Features
The SIGM400 Predator is a rifle while the SIGPM400 Elite PSB is a pistol. The rifles come in either 5.56×45mm NATO with 14.5”, 16", 18”, or 20” barrels threaded 1/2x28 or .300 AAC Blackout with 9” or 16" barrels which are threaded 5/8x24 for muzzle devices such as sound suppressors There are California compliant models for both.[2] 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 has calibers of 5.56×45mm NATO with an 11.5" barrel and .300 AAC BLK with a 9" barrel. Either than use the Pistol Stabilizing Brace accessory.[2]
Ergonomically, the SIGM400 is patterned after the AR-15-type rifle. It has a safety lever on the left side, to be used by the thumb of the shooting hand. Some newer models have an ambidextrous safety selector. The front gas block is railed to accept the front sight with a flip-up sight post.
All models accept AR-15-style box magazines. The rifle is hammer-fired with a single-stage trigger in most models. Some models include a two-stage trigger from the factory.
The SIGM400 has a telescoping skeletonized buttstock. The ACE-style stock moves forward and rearward in 6 positions. A spring-loaded release underneath the buffer tube area locks into each position.
Users
United States: US Military, Philadelphia Police Department, Detroit Police Department SWAT, Franklin County, Ohio Police Department, California Highway Patrol, Indiana State Police use the SIG Sauer M400.[4] [5] [6]
Iraq: Iraqi Special Operations Forces use the SIG Sauer M400.[7]
Oman: Oman Military use the SIG Sauer M400. [8]
Philippines: Philippine Army use the SIG Sauer M400[9]
Switzerland: Switzerland Military use the SIG Sauer M400 rifle [10]
See also
- Heckler & Koch HK416
- SIG Sauer SIG516
- SIG MPX
- M4 carbine
References
- ↑ "SIGM400". SIG Sauer. https://www.sigsauer.com/products/firearms/rifles/sigm400/.
- ↑ 2.0 2.1 2.2 2.3 "SIGM400 Predator". Archived from the original on 28 February 2017. https://web.archive.org/web/20170228081848/https://www.sigsauer.com/store/sigm400-predator.html. Retrieved 27 February 2017.
- ↑ "SIG SAUER’s M400 Predator". http://gunsmagazine.com/curtail-those-coyotes/. Retrieved 27 February 2017.
- ↑ https://www.thefirearmblog.com/blog/2019/01/03/philadelphia-swat-adopts-sig-sauer-m400-pro-rifles/
- ↑ https://www.guns.com/news/2018/09/19/detroit-swat-picks-sig-sauer-m400-in-rifle-contract/
- ↑ https://www.calguns.net/calgunforum/showthread.php?t=675164/
- ↑ https://armamentresearch.com/isof-arms-equipment-part-1-personal-equipment/
- ↑ https://nationalinterest.org/blog/buzz/ultimate-ar-15-rifle-all-time-67792/
- ↑ https://www.facebook.com/117625771741422/posts/1010980279072629?sfns=mo/
- ↑ https://www.tactical-life.com/firearms/sig-sauer-m400-gun-review/
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