SIG Sauer SIG516


The SIG Sauer SIG516 is a gas piston-operated AR-15-style rifle designed and manufactured by SIG Sauer. It is known for its reliability, durability, and ease of maintenance. Here are some key features and details about the SIG516:

Key Features

  1. Operating System: The SIG516 uses a short-stroke pushrod gas piston system, which is different from the direct impingement system found in standard AR-15 rifles. This system helps reduce fouling in the action, leading to increased reliability and easier maintenance.
  2. Calibers: The SIG516 is typically chambered in 5.56x45mm NATO, but there are also variants available in .300 AAC Blackout.
  3. Barrel: The rifle is available with various barrel lengths, including 10″, 14.5″, and 16″. The barrels are made of cold hammer-forged steel and are chrome-lined for durability and longevity.
  4. Stock and Handguard: The SIG516 comes with a variety of stock options, including collapsible and fixed stocks. The handguard is free-floating and typically features multiple Picatinny rails or M-LOK slots for mounting accessories.
  5. Upper Receiver: The upper receiver is constructed from aircraft-grade aluminum and includes a forward assist and dust cover, similar to other AR-15-style rifles.
  6. Sights and Optics: While some models come with flip-up iron sights, the flat-top upper receiver allows for the easy mounting of optics and other sighting devices.
  7. Controls: The controls, including the safety selector, magazine release, and bolt catch, are ambidextrous on many models, catering to both right- and left-handed shooters.


  • SIG516 Patrol: A standard model designed for law enforcement and civilian use.
  • SIG516 CQB (Close Quarters Battle): A shorter, more compact variant with a shorter barrel length, designed for close-quarters operations.
  • SIG516 Precision Marksman: A model with a longer barrel and precision-oriented features, suited for marksmen and long-range shooting.


The SIG516 is favored by law enforcement, military personnel, and civilian shooters due to its robustness and versatile platform. Its gas piston system is particularly appreciated in environments where maintenance can be challenging, as it remains cleaner and cooler compared to traditional direct impingement systems.


Overall, the SIG Sauer SIG516 is a high-quality, versatile, and reliable rifle that offers a modern alternative to the traditional AR-15 platform with its gas piston operating system. Whether for tactical use, law enforcement, or sport shooting, the SIG516 provides a robust and dependable option for various applications.