SIG SG 516

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SIG SG 516 14.5″.jpg
SIG516 Tactical Patrol 14.5″
Type Assault rifle
Semi-automatic rifle
Place of origin  Germany
 United States
Service history
In service 2010–present
Production history
Designer SIG Sauer
Designed 2000s
Manufacturer SIG Sauer
Produced 2010–present
Weight 516 PDW: 6.5 lb (2.95 kg)
516 CQB: 6.9 lb (3.13 kg)
516 Tactical Patrol: 7.09 lb (3.22 kg)
516 Patrol: 7.6 lb (3.45 kg)
516 Precision: 7.7 lb (3.5 kg)
516 Russian: 7.6 lb (3.4 kg)
516 Patrol FDE: 7.6 lb (3.4 kg)
516 OD Green: 7.6 lb (3.4 kg)
Length 516 Patrol (stock extended): 36.7 in (932.2 mm)
516 Patrol (stock collapsed): 33.0 in (838.2 mm)
516 Precision: 39.5 in (1,003.3 mm)
516 Patrol FDE (stock extended): 36.7 in (932.2 mm)
516 Patrol FDE (stock collapsed): 33.0 in (838.2 mm)
516 OD Green (stock extended): 36.7 in (932.2 mm)
516 OD Green (stock collapsed): 33.0 in (838.2 mm)
Barrel length

516 PDW: 7.5 in (190.5 mm)
516 CQB: 10 in (254.0 mm)
516 Tactical Patrol: 14.5 in (368.3 mm)

516 Patrol: 16 in (406.4 mm)
516 Precision: 18 in (457.2 mm)
516 Patrol FDE: 16 in (406.4 mm)
516 OD Green: 16 in (406.4 mm)
516 Russian: 16 in (406.4 mm)


Cartridge 5.56×45mm NATO (.223 Rem), 7.62×39mm
Action Short-stroke Pushrod Gas System, rotating bolt
Feed system 10, 20, 30-round magazine

The SIG516 is a firearm manufactured by SIG Sauer. The rifle is based on the earlier 5.56×45mm NATO AR-15 and the M16.[3]

Design details[edit]

Operating mechanism[edit]

The SIG516 is a semi-automatic firearm multi caliber rifle, intended for civilian and law enforcement markets. The same family also includes selective-fired "assault rifles", strictly intended for law enforcement and military use.[4] 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. This is used to maintain reliability in all environmental and adverse conditions, or with suppressors and 40mm applications.


Ergonomically, the SIG516 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. 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. 516 models are equipped with an M16A2 style bird-cage flash hider.

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

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 must use a different magazine, as they are chambered in 7.62×39mm. The SIG516 Russian uses magazines designed for 7.62×39mm AR-15 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.

A bolt hold-open device locks the bolt carrier assembly open after expending the last cartridge from the magazine and is released by pushing the bolt catch lever located on the left side of the receiver. Alternatively, a left-handed shooter may release the bolt by pulling the charging handle a short distance to the rear.

The SIG516 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 automatically. The upper receiver, lower receiver and handguards are made from aluminum. The 516 Patrol comes in black, while the 516 Patrol FDE and SIG516 OD Green are Cerakoted in their respective colors.

See also[edit]


  1. ^ "SIG Rifles". Retrieved 8 April 2014. 
  2. ^ "SIG Rifles". Retrieved 9 February 2012. 
  3. ^ "SIG Sauer's SIG516: Expect the unexpected". Retrieved 9 February 2012. 
  4. ^ "SIG516 tactical rifle". Retrieved 16 January 2013. 

External links[edit]