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SIG SAUER R516G3556N16BBRZ 516 G3 5.56MM 30+1 16" BBL THREADED BRONZE Guns International #: 103545958 Seller's Inventory #: R516G3-556N-16B-BRZ Category: Sig Sauer Rifles - AR15 Rifles Seller's Information When emailing or calling sellers direct, please mention that you saw their listing on GunsInternational.com Seller: Garys Gun Shop SD Member Since: 11/7/25 State: South Dakota Zip: 57105 Country: United States Phone: (605) 332-6119 Ext. 2 Platinum Seller Number of Active Listings: 422 Seller: FFL Dealer Return Policy: 3 day inspection and return policy on used guns. NO RETURNS ON AMMUNITION. Optics over $200 may be held for payment to process and will be shipped with ADULT SIGNATURE REQUIRED. Ammunition, Firearms, Knives, and Magazines will be shipped ADULT SIGNATURE REQUIRED. Payment Types Accepted: credit card, bank check, money order About Us: Garys Gun Shop is a family-owned firearms retailer in Sioux Falls, South Dakota, serving customers for over 30 years with exceptional service and quality firearms. We maintain an inventory of more than 2,000 new and used firearms, specializing in premium brands including Wilson Combat, Nighthawk Custom, Cooper Firearms, Benelli, Browning, Weatherby, and Winchester. Our knowledgeable staff helps each customer find the perfect firearm. We also operate a 12-lane indoor range and gunsmithing services. You Can Purchase This Item Now, By Following This Link to garysgunshop.com Description: The Sig Sauer SIG516 G3 (R516G3556N16BBRZ) is a 5.56 NATO semi-automatic piston-driven rifle built for sport shooters, duty use, and serious range training who want a battle-tested modern sporting rifle with a standout Bronze Cerakote finish and the reliability of a short-stroke piston system. Key Features Part number: R516G3556N16BBRZ Caliber: 5.56 NATO, also accepts .223 Remington Capacity: 30+1 rounds, includes one 30-round AR-15 polymer magazine Barrel: 16 inch cold hammer forged steel, 1:7 twist rate Barrel threading: 1/2-28 tpi tapered shoulder, compatible with standard AR-15 muzzle devices Muzzle device: Sig Flash Hider-Compensator included Stock: 6-position Magpul DT adjustable stock Grip: AR-compatible reduced-angle grip Handguard: Free-floating M-LOK with Picatinny rail section Receiver finish: Bronze Cerakote Operating system: Short-stroke piston with 3-position adjustable gas system Trigger: Sig Matchlite DUO curved trigger Controls: Fully ambidextrous safety, bolt catch, bolt release, charging handle, and magazine catch Charging handle: Rear and side non-reciprocating Overall length: 36.5 inches extended, 33 inches collapsed Overall width: 3.3 inches Height: 7.8 inches Weight: 7 lbs 11 oz Forward assist: Yes Action: Semi-automatic Special Features The short-stroke piston operating system keeps propellant gases out of the receiver and bolt carrier group, which reduces heat buildup and carbon fouling compared to a direct impingement design. The 3-position adjustable gas system lets you tune the rifle's cycling to match different ammunition loads or to run suppressed without over-cycling the action. Cold hammer forging compresses the barrel steel during manufacturing, producing a harder bore surface that extends barrel life and maintains consistent accuracy over a higher round count. Steel-reinforced components at the cam path and feed ramp address the highest-wear areas in the action, giving the G3 a measurable durability advantage over receivers without reinforced inserts. The rear and side non-reciprocating charging handle operates independently of the bolt carrier group, allowing you to charge or clear the rifle from either side without your support hand leaving the handguard. Full ambidextrous controls from the factory, including the bolt catch and magazine release, mean no aftermarket modification is needed for left-handed shooters. The Bronze Cerakote receiver finish is corrosion-resistant, scratch-resistant, and sets the R516G3556N16BBRZ apart visually from standard black configurations in the G3 lineup. The free-floating M-LOK handguard keeps the barrel completely isolated from sling, bipod, or accessory pressure, protecting accuracy potential at longer distances. Practical Benefits The 6-position Magpul DT stock adjusts to fit a wide range of shooter builds, making the Sig Sauer SIG516 G3 (R516G3556N16BBRZ) a practical fit for adult shooters of different sizes without swapping components. The 1:7 twist rate stabilizes a full spectrum of 5.56 NATO and .223 Remington bullet weights from 55-grain through 77-grain, giving you flexibility to run practice ammunition at the range and heavier loads in the field. The M-LOK handguard gives you a clean, low-profile platform to mount lights, lasers, vertical grips, or a bipod without adding bulk where you do not need it. The threaded 1/2-28 barrel makes the rifle immediately compatible with suppressors and the full range of standard AR-15 muzzle devices, with no additional machining required. Whether you are running drills at the range, competing in 3-gun events, or building a suppressed 5.56 setup, the piston system and adjustable gas block give your rifle the flexibility to perform across all of those roles without tuning issues. If you want a 5.56 NATO piston rifle that combines proven durability, full ambidextrous control, and a finish that stands out on the rack and in the field, this platform delivers all of it without compromise. The Sig Sauer SIG516 G3 (R516G3556N16BBRZ) in 5.56 NATO is a dependable option for the serious sport shooter or duty-minded buyer who demands a piston-driven modern sporting rifle built to run hard and last. SHIPPING TO AK WILL BE EXTRA Price: $2,099.99 Rifle Caliber: 5.56x45mm NATO Manufacturer: SIG SAUER Model: SIG516 G3 Barrel Length: 16 Caliber Info: 5.56MM Condition: NEW Barrel Type: THREADED