Uppers

MGW carries a wide variety of Sig Sauer upper receivers for the M400, SIG516, & AR-15 platform of rifles and pistols. Find conversion kits, stripped uppers, and upper / lower sets to build your firearm around. These quality uppers available in .223 Rem, 5.56x45mm, and .300 Blackout provides you with proven Sig Sauer performance and are reliable solutions for your next build or upgrade project. Find several colors to fit the aesthetics of your firearm and get your rifle or pistol firing reliably shot after shot.

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Sig Sauer 516 Gen2 14.5" Barrel Upper Receiver Assembly, Semi-Auto

Sig Sauer 516 Gen2 14.5" Barrel Upper Receiver Assembly, Semi-Auto

$1,155.00

Not Yet Rated

In Stock

Sig Sauer 516 Gen2 16" Barrel Upper Receiver Assembly, Keymod, Semi-Auto
Sig Sauer M400 Stripped Upper Receiver

Sig Sauer M400 Stripped Upper Receiver

$90.00

Not Yet Rated

In Stock

Sig Sauer M400 Stripped Receiver Set, OD Green

Sig Sauer M400 Stripped Receiver Set, OD Green

$335.00

Not Yet Rated

In Stock

Midwest Gun Works will only ship a Firearm to a Federal Firearms License holder (FFL) located within the United States.

* For more information on purchasing a firearm please read our Firearm Purchasing Policy in the Important Information tab.

All orders will be held until a FFL is received.

Sig Sauer MCX Upper 9" Barrel AR Conversion Kit, 300 Blackout, Tapered Lug, MLOK