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.