SIG516

The SIG516 is a semi-automatic rifle manufactured by SIG Sauer. It is a gas-operated, piston-driven firearm chambered in 5.56x45mm NATO. The rifle is based on the AR-15 platform, incorporating a short-stroke gas piston system that separates the gas system from the bolt carrier group. This design is intended to improve reliability and reduce fouling in the action compared to traditional direct impingement systems.

The SIG516 features an aluminum alloy receiver and a free-floating M-LOK compatible handguard. It typically comes with an adjustable stock and a pistol grip, common to modern sporting rifles. Various configurations of the SIG516 exist, differing in barrel length and furniture. Common barrel lengths include 16-inch and shorter variants for specialized roles. The rifle is equipped with flip-up iron sights and often includes a Picatinny rail for mounting optics and other accessories. The safety selector and magazine release are ambidextrous on many models. The SIG516 is known for its robust construction and the reliability attributed to its piston system, making it a popular choice for civilian shooters, law enforcement, and military applications.