Home » Shop » Sig Sauer 516G3, AR, 5.56 NATO, 16″ Threaded Barrel, Black, 10 Rounds
Home » Shop » Sig Sauer 516G3, AR, 5.56 NATO, 16″ Threaded Barrel, Black, 10 Rounds
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$2,759.98Original price was: $2,759.98.$2,179.00Current price is: $2,179.00.
🚚 Ships to your local FFL — order online, put your FFL dealer’s name and address in the Order notes box at checkout, and we coordinate the rest. Most firearms ship same or next business day. How buying a gun online works.
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Sig Sauer 516 G3 is a semi-auto AR rifle chambered in 5.56 NATO with a 16" threaded barrel and a 10-round capacity. It suits shooters who want a piston-driven AR with an adjustable gas system for range days, training and general-purpose use.
5.56 NATO, semi-auto action
16" barrel, threaded 1/2×28
10-round capacity
Short-stroke piston, adjustable gas system
Ambidextrous controls, Magpul polymer stock
Free-floating M-LOK handguard
SKU: SGR516G3-556N16BCP110 · Mfr part #: R516G3-556N-16B-CP1-10 · UPC: 798681746125
The Sig Sauer 516 G3 is a semi-auto AR rifle in 5.56 NATO with a 16″ threaded barrel and a 10-round capacity. It builds on the 516 series, which Sig Sauer refined in New Hampshire. The finish is matte black, and the stock is an adjustable Magpul polymer model.
What sets it apart
The 516 G3 runs on a short-stroke piston with an adjustable gas system, so you can tune the gas setting to your load and your setup. Sig Sauer also uses steel reinforced components in high wear areas. The handguard is free-floating and uses M-LOK. The muzzle carries a Sig flash hider compensator, and the barrel is threaded 1/2×28.
Handling is set up for both hands. The controls are fully ambidextrous, and the rifle has rear and side non-reciprocating charging handles. The trigger is a Matchlite Duo curved design.
This rifle fits shooters who like a piston AR and want to adjust it themselves. It works for range sessions, carbine classes and general-purpose use. The 10-round capacity is worth checking against your local rules.
For gear, think optic, sling, extra magazines and a cleaning kit. The M-LOK handguard takes lights, grips and other accessories made for that slot. The 1/2×28 threads accept muzzle devices with the same thread.
Order online and we ship it to the licensed FFL dealer you choose near you — see how buying a gun online works. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.
Frequently Asked Questions
Q: Does the Sig Sauer 516 G3 use a piston or direct impingement?
A: It uses a short-stroke piston system. The gas system is adjustable, so you can tune it for your setup.
Q: What is the thread pitch on the 516 G3 barrel?
A: 1/2×28. The 16" barrel is threaded for muzzle devices that use that pitch.
Q: Is the Sig Sauer 516 G3 ambidextrous?
A: Yes. The controls are fully ambidextrous. The rifle also has rear and side non-reciprocating charging handles.
Q: How many rounds does the Sig Sauer 516 G3 hold?
A: 10 rounds. This version is chambered in 5.56 NATO.
Q: Is the Sig Sauer 516 G3 a good rifle?
A: It has a strong feature set. You get a short-stroke piston with adjustable gas, steel reinforced components in high wear areas, a free-floating M-LOK handguard and a Matchlite Duo curved trigger.
Warranty and Manufacturer
Covered by the Sig Sauer factory warranty; warranty terms come from Sig Sauer.
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