The SIG 516 G3 is a 5.56 NATO short-stroke piston rifle (SIG Sauer part no. R516G3-556N-16B-CP1-10) built for shooters who want gas-piston reliability with a full set of ready-to-run features. It runs an adjustable short-stroke piston gas system paired with a free-floating M-LOK handguard, and rear and side non-reciprocating charging handles let a shooter run the rifle from either side without changing grip. Fully ambidextrous controls, a SIG flash hider compensator, and a Matchlite Duo curved trigger round out a build designed for fast, confident handling. This configuration ships as part of SIG’s limited-time Freedom Package promotion, which includes a Base Model P365 pistol at the point of sale with no rebate or extra paperwork required. Feeding from a 10-round magazine and weighing approximately 10.5 lbs, the 516 G3 gives shooters a proven piston platform and a compact carry pistol in one purchase.

Key Specifications

• Chambered in 5.56 NATO for reliable, widely available performance.
• Runs an adjustable short-stroke piston gas system for cleaner cycling.
• Fitted with a 16-inch barrel and a 1:7-inch twist rate.
• Feeds from a 10-round magazine.
• Weighs approximately 10.5 lbs as configured.
• Wears a free-floating M-LOK handguard for mounting accessories.
• Fitted with rear and side non-reciprocating charging handles.
• Runs fully ambidextrous controls for use from either side.
• Equipped with a Matchlite Duo curved trigger.
• Ships as part of the Freedom Package promotion, which includes a Base Model P365 pistol.

Frequently Asked Questions

What comes with the Freedom Package? This configuration includes a Base Model P365 pistol bundled with the rifle at the point of sale.

What caliber does the 516 G3 shoot? It’s chambered in 5.56 NATO, the standard AR-platform cartridge.

Are the controls ambidextrous? Yes, the 516 G3 runs fully ambidextrous controls, including non-reciprocating charging handles on both sides.

Buy the SIG 516 G3

Shooters who want a proven piston rifle bundled with a compact pistol should look closely at this Freedom Package. Order this SIG Sauer rifle from our AR rifle selection at Schaefer Defense, and we’ll ship it insured to your local FFL from our Lubbock, Texas shop.