Gallery: SIG-Sauer 516

The SIG-Sauer 516 Sport Patrol is a short stroke piston system based semiautomatic carbine chambered in .223 Remington, which is in turn derived from the popular AR15 platform

Sig-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
SIG-Sauer 516 semiautomatic carbine in .223 caliber
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The muzzle of the SIG-Sauer 516 carbine features a standard birdcage flash hider
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The front sight base is replaced by a gas unit which houses the short stroke piston and is topped by a short Picatinny rail. Note the bayonet lug
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The 516's ejection port with door is 100% AR-15 standard in shape and size, insuring extremely reliable ejection and cycling...
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
...while the bolt carrier group is completely proprietary, lacking gas relief ports. Note the "zivil" engraving, immediately recognizable as a civilian part
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The 7075-T6 alloy handguard with Picatinny rails features sling mounting points for standard push button release connectors
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The SIG-Sauer 516 semiautomatic carbine in our brief live fire test. In some European markets, the Magpul stock and grip is replaced by FAB Defense products; the folding "iron" sights mounted on the firearms are a set of ARMS Polymer #71L BUIS, while the optical sight is an Aimpoint Micro T1 with an American Defense lever lock mount
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The SIG-Sauer 516 has a standard bolt assist and "T" handle as well.
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
On the left side of the receivers, the usual AR type firearms controls are all easily operated by the shooter
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The MOE (Magpul Original Equipment) pistol grip with accessory compartment
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The very sturdy and reliable Magpul MOE collapsible stock mounted on the 516 rifle
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The railed handguard on the SIG-Sauer 516 carbine is manufactured in the same 7075-T6 alloy as the receivers of the firearm, while the gas block that houses the "inverted" short stroke piston and op rod is carbon steel
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
SIG-Sauer 516 semiautomatic carbine in .223 caliber: left side view
Sig-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
SIG-Sauer 516 semiautomatic carbine in .223 caliber: right side view
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The SIG-Sauer 516 rifle field stripped
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
The Bolt and BCG assembly stripped for cleaning; the bolt is 100% Mil Spec. Note the protrusion on top of the BCG that impinges on the op rod
SIG-Sauer 516 semiautomatic carbine in .223 caliber
Franco Palamaro
Detail of the short stroke piston and op rod removed from the 516 rifle