Sig Sauer SIG516 & M400
Parts listed here are designed for both the Sig Sauer M400 Tread & SIG516 rifle models chambered in .223 Rem/5.56x45mm or .300 Blackout unless noted otherwise. MGW carries replacement uppers, lowers, magazines, triggers, sights, handguards, springs and other components for these modular sporting firearm models. Service your Sig M400 or SIG516 with quality OEM and aftermarket parts/components to ensure a solid performance from each and every shot.
Showing 17 - 32 of 55 results
Showing 17 - 32 of 55 results


Sig Sauer M400, 516 Ambi Magazine Catch
$23.76
In Stock

Sig Sauer M400 Tread Sight Set
$144.54
In Stock

Sig Sauer M400 Tread Enhanced Handguard, MLOK, Black
$144.54

Sig Sauer M400 TREAD Vertical Grip w/Barricade Stop, Black
$47.52
In Stock

Sig Sauer M400 TREAD Handstop Kit, Black
$47.52
In Stock

Sig Sauer M400 TREAD Charging Handle Assembly
$76.56
In Stock

Sig Sauer M400 TREAD Forward Grip Kit, Black
$76.59
In Stock

Lancer Systems Sig 516 Carbon Fiber Handguard, Carbine Length w/ Top Rail
$277.59
In Stock

Lancer Systems Sig 516 Carbon Fiber Handguard, Extended Length w/ Top Rail
$307.59
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