Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Questions & Answers
Does it come with a bolt carrier

Yes it does.

by Geoff, Verified Owner, January 27, 2022
Where was this made and is the 14,5inch version pinned and welded??? Expert Answer

The SIG SAUER Sig516 Gen 2 Upper Receiver Assembly Complete is no longer available. However, the barrel is not pinned and welded. For information regarding where the SIG SAUER Sig516 Gen 2 Upper Receiver Assembly Complete was made I recommend contacting Sig Sauer.

by Hunter, Gear Expert, July 6, 2023
Customer Reviews
Helpful Positive Review Best Gas Piston Upper Hands Down by Just Another Consumer, February 3, 2021
So I have purchased a handful of these uppers once I got away from DI AR’s I have dedicated one to putting it through hello . So far so good. 7500 rounds and so far not one failure. Only maintenance I do is to clean the barrel for break in and keep t...
Read More...
14/14 found this helpful
Helpful Positive Review Best piston upper for the money by Michael S, Verified Owner, February 24, 2022
You won't find them for long, and definitely not as this price. It's an overrun order, but it usually sells out fast. Word must not be out there here yet, and it's been a few years. You really can't find a quality upper like Sig, especially at this p...
Read More...
2/2 found this helpful
Helpful Positive Review Solid and well built by Benjamin, January 31, 2022
There's not been a whole lot of chances to shoot but what we've done has shown these uppers to be solidly built. And for the price OP had them listed for pretty spectacular. I do wish that they came with irons of some sort but that's not nearly enoug...
Read More...
2/2 found this helpful
Helpful Positive Review Great deal, sweet weapon system by Nevertoomany895, Verified Owner, May 27, 2022
I have bought a few of these, top notch uppers. Fast ship and great deal from Ootics planet. Great upper, heavy, but the piston system and quad rail will do that. Trade off is an equal or some say superior system to the HK without the crazy price tag
1/1 found this helpful
Helpful Positive Review Excellent Buy From Optics Planet by Ed Medina, November 27, 2021
An excellent buy from a reputable company! I purchased a Sig Sauer Sig516 Gen 2 complete upper assembly from Optics Planet because it is an improved model of a more expensive product; the HK416. This exclusive item was reasonably priced for this top ...
Read More...
6/9 found this helpful
Most Recent Reviews Great upper at a very good price by BD, Verified Owner, February 24, 2022
Receiver came packaged very securely and pinned onto my assembled lower with no issue.I have been able to send a few rounds through the upper and everything functioned flawlessly. It’s a very good value with Sig quality.
Read All 6 Reviews
Caliber: .223 Remington , 5.56x45mm NATO Barrel Length: 14.5 inThreads per Inch: 1/2x28 Finish: Anodized Color: Black Gun Model: AR-15 , SIG Sauer SIG 516 Condition: Factory DEMO Fabric/Material: Aluminum , Steel Gun Rail: Picatinny Gun Type: Rifle Gun Make: AR Platform , SIG Sauer Included Accessories: Standard

Code: SD9-UFH-SSUA516G210-UA516G2-14-DEMO

MPN: UA516G2-14-DEMO

Product No Longer Available

Product Info for SIG SAUER Sig516 Gen 2 Upper Receiver Assembly Complete

SIG SAUER Sig516 Gen 2 Upper Receiver Assembly allows operators to upgrade their current AR-15/M16/M4-type rifles from direct gas impingement systems to the SIG SAUER advanced short-stroke push rod system. This advanced operating system reduces carbon fouling, excessive heat and unburned powder in the action, ensuring reliability and function that is unmatched. A standard 5.56mm NATO chrome-lined chamber and bore ensure reliable function in any environment.image

Barrels feature an A2 flash suppressor and are threaded 1/2"x28 TPI, allowing the SIG516 to adapt to a number of aftermarket accessories and suppressor mounts.

Package Contents:

  • SIG SAUER Sig516 Gen 2 Upper Receiver Assembly Complete

SIG SAUER Sig516 Gen 2 Upper Receiver Assembly Complete Accessories

1–11 / 11

Gun Triggers

1–14 / 14
Previous
Next

Gunsmithing Tools & Accessories

1–16 / 16
Previous
Next

Gun Parts and Accessories

1–30 / 30
Previous
Next

Magazine and Accessories

1–22 / 22
Previous
Next

Gun Barrels

1–13 / 13
Previous
Next

Gun Sights

1–18 / 18
Previous
Next

Gun Stocks

1–19 / 19
Previous
Next

Mounts, Rings and Accessories

1–16 / 16
Previous
Next

Related Products to SIG SAUER Sig516 Gen 2 Upper Receiver Assembly Complete

SIG SAUER Sig516 Gen 2 Upper Receiver Assembly Complete Unavailable & Discontinued Models

List of Unorderable Models

DEMO, SIG SAUER Gen 2 Upper Receiver Assembly Complete, SIG Sauer SIG 516/AR-15, 14.5 in, Black, UA516G2-14 , MPN: UA516G2-14-DEMO , Code: SD9-UFH-SSUA516G210-UA516G2-14-DEMO
SIG SAUER Gen 2 Upper Receiver Assembly Complete, SIG Sauer SIG 516/AR-15, 14.5 in, Black, UA516G2-14 , MPN: UA516G2-14 , UPC: 798681441549 , Code: SD9-UFH-SSUA516G210-UA516G2-14
SIG SAUER Gen 2 Upper Receiver Assembly Complete, SIG Sauer SIG 516/AR-15, 10 in, Black, UA516G2-10 , MPN: UA516G2-10 , UPC: 798681441525 , Code: SD9-UFH-SSUA516G210-UA516G2-10
SIG SAUER Gen 2 Upper Receiver Assembly Complete, SIG Sauer SIG 516/AR-15, 11.5 in, Black, UA516G2-11 , MPN: UA516G2-11 , UPC: 798681441525 , Code: SD9-UFH-SSUA516G210-UA516G2-11
Compare (0)