SIG SAUER SIG516 G3 Freedom Package 5.56 NATO Rifle

Description

SIG SAUER SIG516 G3 Freedom Package 5.56 NATO Rifle

The SIG SAUER SIG516 G3 Freedom Package brings the company’s piston-operated 516 platform into a modern 16-inch rifle configuration. Chambered for 5.56 NATO and compatible with .223 Remington ammunition of the appropriate specification, this model uses a short-stroke gas-piston operating system rather than a conventional direct-gas setup. The result is a durable, AR-pattern rifle built around adjustable gas regulation, ambidextrous operation, and contemporary accessory mounting.

This exact rifle is identified by manufacturer part number R516G3-556N-16B-CP1 and UPC 798681746118. It has a black finish, 30-round capacity, a 16-inch threaded barrel, and a 1:7-inch twist rate. The configuration is intended for buyers who want the familiar controls and modularity of an AR-style rifle while preferring the operating characteristics of a short-stroke piston system.

Short-Stroke Piston System and Adjustable Gas

The SIG516 G3’s piston assembly keeps the primary flow of propellant gas forward near the gas block instead of routing it directly into the bolt-carrier group. Its adjustable gas system lets the operating cycle be tuned for different conditions and compatible muzzle-device setups. This can be useful when ammunition, fouling, adverse conditions, or suppressor use changes the amount of gas needed for dependable cycling.

SIG reinforces high-wear areas, including the cam path and feed-ramp region, to support long-term use. The design retains a rotating bolt and familiar AR-pattern manual of arms, so shooters already accustomed to this platform will recognize its core handling and maintenance layout. As with any semiautomatic rifle, reliability depends on suitable ammunition, correct gas adjustment, proper lubrication, and regular inspection.

Cold-Hammer-Forged Barrel and Free-Floating Handguard

The 16-inch cold-hammer-forged barrel has a 1:7-inch twist, a versatile rate suited to a broad selection of commonly used 5.56 NATO projectiles. The muzzle uses 1/2×28 threads and is supplied with SIG’s flash-hider compensator. Confirm the thread specification, bore clearance, and installation requirements before changing the factory muzzle device.

A free-floating M-LOK handguard provides mounting positions for compatible lights, sling hardware, hand stops, and other accessories without placing accessory pressure directly on the barrel. The uninterrupted top rail supports an appropriate optic or sighting system, while the black furniture and adjustable Magpul stock provide a practical general-purpose layout. Select accessories that do not obstruct the gas regulator, controls, or safe operation of the rifle.

Ambidextrous Controls and Charging Options

The rifle includes ambidextrous bolt catch, magazine catch, safety, and charging controls. SIG’s rear and side non-reciprocating charging arrangement gives the shooter more than one way to operate the action while the side handle remains stationary during firing. This layout supports left- or right-side manipulation and can be helpful when working around a mounted optic or shooting position.

A SIG Matchlite DUO curved trigger provides a defined two-stage-style trigger feel for deliberate shooting. The rifle accepts compatible AR-pattern magazines and includes a 30-round magazine where lawful. Magazine capacity, firearm configuration, and permissible accessories remain subject to the buyer’s state and local regulations.

Key Features

• Caliber: 5.56 NATO / .223 Remington
• Action: Semiautomatic, short-stroke piston
• Gas system: Adjustable
• Barrel: 16-inch cold-hammer-forged barrel
• Twist rate: 1:7 inches
• Muzzle threads: 1/2×28
• Capacity: 30 rounds
• Handguard: Free-floating M-LOK
• Controls: Ambidextrous bolt catch, magazine catch, safety, and charging controls
• Trigger: SIG Matchlite DUO curved trigger
• Stock: Adjustable Magpul stock
• Finish: Black
• Manufacturer part number: R516G3-556N-16B-CP1
• UPC: 798681746118

Exact Variant and Transfer Information

This listing is for the 30-round SIG516 G3 Freedom Package, not the separate 10-round version or another barrel-length or finish variant. Check the manufacturer part number and UPC before arranging transfer. A compatible sighting system may be required if the rifle is not supplied with sights in the final distributor package.

This firearm must be transferred through a licensed dealer where required. The buyer is responsible for confirming current laws governing rifle features, magazine capacity, possession, transfer, and use in the destination jurisdiction. Read the SIG SAUER owner’s manual, inspect the unloaded rifle, and obtain appropriate training before use.