Engineering:SIG Sauer SIG516

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SIG 516
SIG SG 516 14.5″.jpg
The SIG 516 Tactical Patrol 14.5″
TypeSemi-automatic rifle
Assault rifle (SIG516)
Battle rifle (SIG716)
Place of originUnited States
Service history
In service2010–present
Used bySee Users
Production history
ManufacturerSIG Sauer
VariantsSIG716
Specifications
Cartridge5.56×45mm NATO (SIG516)
7.62×39mm (SIG516)
7.62×51mm NATO (SIG716)
6.5mm Creedmoor (SIG716)
ActionShort-stroke piston, rotating bolt
Effective firing range500 meters
Feed system10, 20, 30-round detachable magazine
SightsIron sights or picatinny rail for various optics

The SIG Sauer SIG516 is a semi-automatic rifle manufactured by SIG Sauer. It is an AR-15 style rifle chambered in 5.56×45mm NATO.[1] Introduced in 2010, the SIG516 was discontinued as of 2019.[citation needed] A variant chambered in 7.62x51mm NATO, the SIG716i, remains in production.[2]

Design details

Operating mechanism

Short-stroke gas piston

The SIG516 is a semi-automatic multi-caliber rifle. It fires from a closed bolt, and has a short-stroke push rod piston system. The gas piston pushes the bolt carrier rearward, where it is returned to the forward and locked position by a spring. This process loads the next cartridge. The 516 has a four-position gas regulator, allowing the user to choose the amount of gas directed to the piston.[3]

Features

The SIG516 has a safety lever on the left side, to be used by the thumb of the shooting hand. The gas block integrates an adjustable gas regulator. The front gas block is railed to accept the front sight with a flip-up sight post. SIG516 models are equipped with an M16A2 style bird-cage flash hider.

All SIG516 models except the Marksman are equipped with 16-inch (410 mm) barrels shrouded by a free-floating M1913 Picatinny rail, as well as flip-up iron sights (BUIS) made by SIG Sauer.[4]

The 5.56×45mm NATO SIG516 models accept AR-15 style box magazines. These magazines are constructed in 5-, 10-, 20-, and 30-round variants. SIG516 Russian rifles use a different magazine, as they are chambered in 7.62×39mm. The SIG516 Russian uses magazines designed for 7.62×39mm AR-15 style rifles. The rifle is hammer-fired and has a two-stage trigger mechanism in the SIG516 Marksman, while all others have a military specification single-stage trigger.

It is built to pass the NATO test protocol “Over the Beach”, meaning the SIG516 is designed to fire safely as quickly as possible after being submerged in water.

Variants

Template:Primary sources section

SIG716

The SIG716 is battle rifle variant,[5] which is based on the same design, but is chambered for the larger 7.62x51mm NATO round and uses SR-25 pattern magazines.[6]

SIG716 G2

The SIG716 G2 (Generation 2) variant features a short-stroke pushrod gas system. This operating system reduces carbon fouling, excessive heat and unburned powder in the action, ensuring further improved reliability and function.[7] The G2 Patrol model is chambered in 7.62×51mm NATO,[8] while the G2 DMR model is chambered in 6.5mm Creedmoor.[9]

SIG 716i

The 716i (impingement) variant features a direct impingement gas system instead of short-stroke pushrod gas system. This operating system has helped Sig Sauer to bring down the cost of manufacturing and pushing more sales of 716i, while improving weight reduction.[10] The 716i is chambered in 7.62×51mm NATO.[11] Sig Sauer appears to have discontinued SIG716 and SIG716 G2 models, since the company stopped displaying these products in their website, while they continue to sell magazines and spare parts in their online store. The 716i has been recognized as the best AR-10 rifle for the year 2020, by readers' choice voting of Ballistic magazine.[12]

Users

Indian army personnel from White Knight Corps armed with a Sig 716i, 2021
  •  Canada: Used by Canadian Special Operations Forces Command.[13]
  •  Egypt: Used by Navy El-Sa'ka Forces.[14]
  •  Georgia: In use with the Georgian MIA and MOD special forces[15]
  •  Hong Kong: Used by the Hong Kong Police Force including the Special Duties Unit and the Counter Terrorism Response Unit.[16][17]
  •  India: Order placed for 72,400 units of SIG 716i model. In December 2019, the first lot of 10,000 rifles was delivered to the Indian Army’s Northern Command.[18] An additional order for 72,000 rifles was confirmed by SIG Sauer in July 2020.[19][20] The order for the second batch of 72,000 assault rifles would be coming after the first batch has been delivered.[21] Sig Sauer also confirmed that delivery of the first order has already been completed.[22]
  •  Indonesia: Used by the Mobile Brigade of the Indonesian National Police,[23] SIG716 G2 used by Indonesian National Armed Forces special forces unit.[24]
  •  Mexico: Transitioning into the general service rifle of the Naval Infantry Force.[25]
  •  Serbia: Used by PTJ (Counter-Terrorist Unit) of Serbian Police[26]
  •   Switzerland: Used by the Mobilen Einsatzpolizei of the Aargau Police.[27]
  •  Turkey: Used by Police Special Operation Department and Police Counter Attack Teams[28]
  •  United Kingdom: Used by Metropolitan Police Counter Terrorist Specialist Firearms Officers (CTSFO)[29] Surrey Police and West Midlands Police[30]
  •  United States: Used by Florida Highway Patrol when purchased in 2019, Delaware State Police when purchased in 2012 and also by Cincinnati Police Department SWAT, as well as the Anderson County, South Carolina Sheriff's Office SWAT.[31] San Diego Police Department SWAT, in which the rifles will replace out aging Vietnam era M16s.[32]

See also

References

  1. ↑ "SIG Sauer's SIG516: Expect the unexpected". American Rifleman. http://www.americanrifleman.org/articles/sig516-review/. 
  2. ↑ "Full Rifle/Pistol Catalog". https://www.sigsauer.com/full-product-catalog/all-rifles/. 
  3. ↑ "Meet the Sig Sauer 516 Rifle: The Best AR-15 Around?". 2019-06-30. https://nationalinterest.org/blog/buzz/meet-sig-sauer-516-rifle-best-ar-15-around-64661. 
  4. ↑ "SIG-Sauer 516". 27 October 2010. https://modernfirearms.net/en/assault-rifles/u-s-a-assault-rifles/sig-sauer-516-eng/. 
  5. ↑ "SIG716" (in en-US). SIG Sauer. https://www.sigsauer.com/products/firearms/rifles/sig716/. 
  6. ↑ "SIG-Sauer 716". 27 October 2010. https://modernfirearms.net/en/assault-rifles/u-s-a-assault-rifles/sig-sauer-716-eng/. 
  7. ↑ "SIG716". https://www.sigsauer.com/products/firearms/rifles/sig716/. 
  8. ↑ "SIG716G2 Patrol". https://www.sigsauer.com/store/sig716g2-patrol-1.html. 
  9. ↑ "SIG716G2 DMR FDE/BLK". https://www.sigsauer.com/store/sig716g2-dmr-fde.html. 
  10. ↑ "716i TREAD". https://www.sigsauer.com/sig716-tread.html. 
  11. ↑ "716i TREAD". https://www.sigsauer.com/sig716-tread.html. 
  12. ↑ "SIG Sauer 716i TREAD: 2020 Reader's Choice for 'Best AR-10 Rifle'". 21 January 2021. https://www.ballisticmag.com/sig-716i-tread-best-ar-10-rifle. 
  13. ↑ "New rifles delivered for Canadian Forces sniper teams". 10 December 2020. https://ottawacitizen.com/news/national/defence-watch/new-rifles-delivered-for-canadian-forces-sniper-teams. 
  14. ↑ "POTD: Egyptian Navy SOF with SIG-516s -". 20 April 2019. https://www.thefirearmblog.com/blog/2019/04/20/potd-egyptian-navy-sof-with-sig-516s/. 
  15. ↑ "geo-army.ge". http://www.geo-army.ge/index.php?option=com_content&view=article&id=819%3A-26052014-&catid=46%3A2&lang=en. 
  16. ↑ Colclough, George (17 May 2020). "Explainer: The hidden differences between Hong Kong police rifles". Hong Kong Free Press. https://hongkongfp.com/2020/05/17/explainer-the-hidden-differences-between-hong-kong-police-rifles/. 
  17. ↑ "【CTRU出擊・有片・多圖】模擬恐襲發生 反恐特勤隊新槍截擊槍手" (in Chinese). HK01. 28 February 2017. https://www.hk01.com/%E7%A4%BE%E6%9C%83%E6%96%B0%E8%81%9E/74900/ctru%E5%87%BA%E6%93%8A-%E6%9C%89%E7%89%87-%E5%A4%9A%E5%9C%96-%E6%A8%A1%E6%93%AC%E6%81%90%E8%A5%B2%E7%99%BC%E7%94%9F-%E5%8F%8D%E6%81%90%E7%89%B9%E5%8B%A4%E9%9A%8A%E6%96%B0%E6%A7%8D%E6%88%AA%E6%93%8A%E6%A7%8D%E6%89%8B. 
  18. ↑ "SIG Sauer SIG716 for India" (in en-CA). 2019-12-11. https://timesofindia.indiatimes.com/videos/news/indian-army-gets-new-american-assault-rifles-in-kashmir-valley-to-combat-terror-activities/videoshow/72466941.cms. 
  19. ↑ Singh Negi, Manjeet (July 12, 2020). "Army to place order for 72,000 more Sig716 assault rifles from US" (in en). https://www.indiatoday.in/india/story/army-to-place-order-for-72-000-more-sig716-assault-rifles-from-us-1699762-2020-07-12. 
  20. ↑ Moss, Matthew (July 14, 2020). "BREAKING: Indian Army Orders More 716i Rifles from SIG Sauer". https://www.thefirearmblog.com/blog/2020/07/14/breaking-indian-army-orders-more-716i-rifles-from-sig-sauer/. 
  21. ↑ "Indian Army to order 2nd batch of 72,000 Sig Sauer 716 American assault rifles". 12 July 2020. https://zeenews.india.com/india/indian-army-to-order-2nd-batch-of-72000-sig-sauer-716-american-assault-rifles-2295279.html. 
  22. ↑ "Indian Army Orders More 716i Rifles from SIG Sauer". 16 July 2020. https://www.overtdefense.com/2020/07/16/indian-army-orders-more-716i-rifles-from-sig-sauer/. 
  23. ↑ "SIG516 Patrol: Opsi Berkualitas Tinggi Di Kaliber 5,56mm" (in id). 3 June 2016. https://www.indomiliter.com/sig516-patrol-opsi-berkualitas-tinggi-di-kaliber-556mm/. 
  24. ↑ "Milipol Asia 2017: Up-gunning Asian security forces | Shephard" (in en). https://www.shephardmedia.com/news/landwarfareintl/milipol-asia-2017-gunning-asian-security-forces/. 
  25. ↑ "México llega al Rimpac 2018 equipado con el Sig Sauer 5.56". https://www.infodefensa.com/latam/2018/07/17/noticia-mexico-llega-rimpac-equipado-sauer.html. 
  26. ↑ [1]
  27. ↑ "Mit dieser Waffe reagiert die Aargauer Polizei auf die Pariser Anschläge" (in German). Aargauer Zeitung. 12 January 2016. https://www.aargauerzeitung.ch/aargau/kanton-aargau/mit-dieser-waffe-reagiert-die-aargauer-polizei-auf-die-pariser-anschlage-ld.1743174. 
  28. ↑ "Özel harekâta özel silah | Şanliurfa Haberleri". http://www.urfa1.com/ozel-harekata-ozel-silah.htm#. 
  29. ↑ Dodd, Vikram (29 June 2015). "Scotland Yard creates SAS-style unit to counter threat of terrorist gun attack". The Guardian. https://www.theguardian.com/uk-news/2015/jun/29/scotland-yard-creates-sas-style-unit-to-counter-threat-of-terrorist-gun-attack. 
  30. ↑ "Birmingham accidental firearms discharge investigation complete – Independent Police Complaints Commission". https://www.ipcc.gov.uk/news/birmingham-accidental-firearms-discharge-investigation-complete. 
  31. ↑ "Cincinnati SWAT selects SIG516 CQB; Delaware State Police pick SIG516". 2015-04-11. http://www.tactical-life.com/news/cincinnati-swat-selects-sig516-cqb-delaware-state-police-pick-sig516/. 
  32. ↑ Phillips, Sandra (February 26, 2013). "SDPD given new SWAT equipment". http://fox5sandiego.com/2013/02/26/sdpd-given-new-swat-equipment/. 

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