Home » Shop » Sig Sauer 516G3, Semi-automatic Rifle, 5.56 NATO, 16″ Barrel, Black, 30 Rounds
Home » Shop » Sig Sauer 516G3, Semi-automatic Rifle, 5.56 NATO, 16″ Barrel, Black, 30 Rounds
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$2,179.99Original price was: $2,179.99.$1,999.99Current price is: $1,999.99.
🚚 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-automatic AR-style rifle chambered in 5.56 NATO with a 16" threaded barrel and an adjustable short-stroke piston gas system. It is for AR shooters who want a piston-driven rifle with ambidextrous controls for range days, training and general-purpose use.
5.56 NATO semi-automatic rifle
16" barrel, threaded 1/2×28
30-round magazine capacity
Short-stroke piston with adjustable gas system
Free-float M-LOK handguard
Black anodized finish
SKU: SGR516G3-556N-16B · Mfr part #: R516G3-556N-16B · UPC: 798681726684
Sig Sauer 516 G3 is a semi-automatic AR-style rifle chambered in 5.56 NATO with a 16″ barrel. It runs on a short-stroke piston with an adjustable gas system, so you can tune the gas settings to suit your ammo and conditions. The finish is black anodized.
What sets the 516 G3 apart
The 516 G3 builds on the 516 series and is made in New Hampshire. Sig uses steel reinforced components in the high wear areas. The handguard is free-floating and uses M-LOK. You get a rear charging handle and a side charging handle, and both are non-reciprocating. The controls are fully ambidextrous, which helps left-handed shooters as much as right-handed ones.
Up front, the 16″ barrel is threaded 1/2×28 and wears a SIG flash hider compensator. If you prefer a different muzzle device, it will need to fit that thread. The trigger is a Matchlite Duo curved trigger, and the stock is a Magpul DT polymer stock.
This rifle suits shooters who like piston guns and want to adjust the gas to their load. It works for range sessions, training classes and general use. For gear, think about a sling, an optic, and M-LOK accessories such as a light, a vertical grip or a bipod. Spare 30-round magazines are an easy add. A cleaning kit rounds out the setup.
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: What caliber is the Sig Sauer 516 G3?
A: 5.56 NATO. This model is semi-automatic and has a 16" barrel.
Q: Is the Sig Sauer 516 G3 barrel threaded?
A: Yes. The muzzle is threaded 1/2×28 and comes with a SIG flash hider compensator.
Q: Does the Sig Sauer 516 G3 use a piston?
A: Yes. It has a short-stroke piston system with an adjustable gas system, so you can tune the gas settings.
Q: How many rounds does the Sig Sauer 516 G3 hold?
A: 30 rounds. That is the magazine capacity for this model.
Q: Is the Sig Sauer 516 G3 ambidextrous?
A: Yes. The controls are fully ambidextrous, and it has both a rear and a side non-reciprocating charging handle.
Warranty and Manufacturer
Covered by the Sig Sauer factory warranty; warranty terms come from Sig Sauer.
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