SIG SAUER SIG516 G3 Mohawk 5.56 NATO Rifle – 16 Inch, Black

SIG SAUER SIG516 G3 Mohawk 5.56 NATO Rifle

The SIG SAUER SIG516 G3 Mohawk updates the proven 516 piston-rifle platform with modern controls, reinforced wear surfaces, and a flexible accessory interface. This exact black configuration, manufacturer part number R516G3-556N-16B, is chambered in 5.56 NATO and uses a 16-inch cold-hammer-forged barrel. Its short-stroke piston operating system and adjustable gas system distinguish it from a conventional direct-impingement AR while retaining an AR-compatible layout, magazine pattern, and familiar handling characteristics.

Adjustable Short-Stroke Piston System

Instead of directing propellant gas into the receiver, the SIG516 G3 uses a short-stroke piston to cycle the action. Moving the operating gas forward helps limit the amount of heat and carbon deposited in the bolt-carrier area during firing. SIG SAUER pairs the piston with an adjustable gas system, allowing the operating setting to be tuned for different conditions and equipment within the manufacturer’s guidance.

The rifle also incorporates steel reinforcement in high-wear areas, including the cam path and feed-ramp region. Those details support the G3’s emphasis on durability and extended service. A forward assist remains part of the receiver layout, preserving another familiar AR-pattern control.

Cold-Hammer-Forged 16-Inch Barrel

The 16-inch steel barrel is cold hammer forged and uses a 1:7-inch twist rate. That twist is suitable for a wide range of common 5.56 NATO and .223 Remington projectile weights. The muzzle is threaded 1/2×28 with a tapered shoulder and fitted with SIG SAUER’s flash hider-compensator. The rifle’s listed overall length is approximately 36.5 inches with the stock extended and 33 inches collapsed, while listed weight is about 7.7 pounds before ammunition and added accessories.

Dual Non-Reciprocating Charging Handles

The SIG516 G3 includes both rear and side non-reciprocating charging handles. This gives the shooter more than one way to operate the action from common positions without the side handle moving during the firing cycle. The arrangement works with the rifle’s fully ambidextrous control package, which includes the safety, magazine catch, bolt catch and release, and charging handle functions. Right- and left-handed users can therefore manipulate the principal controls without reconfiguring the rifle.

Free-Floating M-LOK Handguard

A free-floating alloy handguard surrounds the barrel and provides M-LOK attachment slots for compatible lights, sling hardware, hand stops, and other accessories. The Picatinny top rail supplies mounting space for a suitable optic and related equipment. Because the handguard does not bear directly on the barrel, pressure from a support hand, rest, or mounted accessory is isolated from the barrel to help preserve a consistent point of impact.

Trigger, Stock, and Grip

SIG SAUER equips the rifle with a Matchlite DUO curved trigger. A six-position Magpul DT stock allows the length of pull to be adjusted for the user, clothing, armor, and shooting position. The AR-compatible reduced-angle grip supports a practical wrist position, particularly when the stock is shortened. The furniture and black anodized receiver and handguard finish create a cohesive, duty-oriented configuration.

Key Features

• 5.56 NATO semi-automatic piston-driven rifle
• Adjustable short-stroke piston operating system
• 16-inch cold-hammer-forged steel barrel
• 1:7-inch twist rate
• 1/2×28 threaded muzzle with SIG flash hider-compensator
• Rear and side non-reciprocating charging handles
• Fully ambidextrous safety, magazine catch, and bolt controls
• Steel-reinforced high-wear areas
• Free-floating M-LOK handguard and Picatinny top rail
• Matchlite DUO curved trigger
• Six-position Magpul DT stock
• One 30-round polymer magazine included

Exact Product Identification

This listing is for the black SIG516 G3 Mohawk with UPC 798681726684. It is not the Bronze Cerakote model, 10-round configuration, or short-barreled version. Firearm, magazine-capacity, and feature restrictions vary by jurisdiction; confirm that this exact configuration is legal where you live before ordering.