Gun Deals: Sig Sauer Sig516 Gen 2 5.56 Upper Receiver Assembly Complete $539.99

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Sig Sauer Sig516 Gen2 5.56 Upper Receiver Complete Deal 2022aaa

USA – -( Optics Planet has the Sig Sauer Sig516 Gen 2 5.56 Upper Receiver Assembly Complete in 5.56 NATO with the ATLAS R-ONE Handguard for $539.99. The Sig Sauer Sig516 Gen 2 5.56 Upper Receiver Assembly Complete generally retails for $1170.00!? This is a crazy-good smoking deal!

Sig Sauer Sig516 Gen 2 Upper Receiver Assembly Complete.

  • Brand: Sig Sauer
  • SKU: SD9-UFH-SSUA516G210-UA516G2-14
  • UPC: 798681441549
  • MPN: UA516G2-14
  • Caliber: 5.56 NATO
  • Color: Black
  • Model Name: Sig Sauer Sig516 Gen 2 Upper Receiver
  • MSRP: $1155.00

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 pushrod system. This advanced operating system reduces carbon fouling, excessive heat, and unburned powder in the action, ensuring reliability and function that is unmatched.

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.

Specifications for Sig Sauer Sig516 Gen 2 Upper Receiver Assembly Complete:

  • Color: Black
  • Finish: Anodized
  • Caliber: 5.56x45mm NATO
  • Barrel Length: 14.5 in
  • Gun Model: SIG Sauer SIG 516

A standard 5.56mm NATO chrome-lined chamber and bore ensure reliable function in any environment.

Gun Deals: Sig Sauer Sig516 Gen 2 5.56 Upper Receiver Assembly Complete $539.99

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Oh, Oh, Oh, watch out, the barrel isn’t 16 inches long. It’s the dreaded SBR. You might have to pay a tax and get special permission to own it in a few months or become a felon if you don’t register it. Don’t forget, with the new rules that have just been written even though they are not going to be enforced, YET, you cannot have the barrel shroud on it either because it is a second place to hold on to it which makes it a rifle. Oh no, Mr. Bill.

What bullshit. SBR = So Beware Republicans.


You could blind pin and weld.
It’s weird that they keep pushing this deal when it’s estimated to be in stock 5-8 months from now. Might be in stock after it’s illegal period




Can this upper receiver fire 55 grain ammo without failure or complications?


I would guess yes due to gas piston. However, you may not get the greatest expansion and stabilization.


Sure, depending on what your definition of “complications” is…

Deplorable Bill

A buddy of mine ordered one of these from optic planet. Was back ordered for 11 months. He was asked to give up many times. When he found them in stock at brand x, he called optic planet to inform them and ask why they still did not have any. When it did finally arrive, the box had a heavy layer of dust on it. I saw it myself, it looked like it had been in a very dusty place for a very long time. He is very happy with the upper.

Arm up and carry on

Dave in Fairfax


Pistols or rifles?
They are OK , my daughter uses a db-9 as her back-up. It prefers win as I remember. Too small for my hands, but she shoots nice groups at combat ranges with it.
The DB-15 is an acceptable low end rifle.
What else can I tell you?

Last edited 2 years ago by Dave in Fairfax
Dave in Fairfax


$600 USED? Wow, I think mine was $399 new.
I doubt that they were made by Colt, but stranger things have happened. I don’t have one of each to break down and compare. If one showed up again, I’d grab it. They aren’t fancy, but I don’t believe in safe queens so that isn’t an issue.

Dave in Fairfax

Nolo problemo


I ran 1000 rounds through a gas mitigated AR 15 once just to see how soon it would fail from not cleaning it. Well at 1000 rounds I figured that was enough and I cleaned it anyway. This redesign of a proven design makes no sense to me, PLUS it is ugly with its outdated picatinny quad rail on it. SIG thinks their poop don’t stink. $569 is STILL overpriced. That’s my 2 cents worth.