Sig MCX Virtus Piston Assembly – 16″ Barrel | 5.56 NATO
Not Yet Rated | Write the First Review SKU: 222-SIG-KIT-MCX-PISTON-16B-556
UPC: 799000000000
MFG#: KIT-MCX-PISTON-16B-556

MCX Virtus Piston Assembly – 16″ Barrel | 5.56 NATO

Factory-Tuned Gas System for Peak Performance in 16″ MCX Builds

Maintain the legendary reliability of your SIG MCX Virtus 5.56 NATO rifle with this factory OEM piston assembly, purpose-built for 16-inch barrel configurations. Designed by SIG SAUER for optimal gas regulation and consistent cycling, this short-stroke gas piston assembly ensures smooth operation—suppressed or unsuppressed—across a wide range of ammunition and conditions.

This component is a direct replacement for your existing MCX piston system and is essential for maintaining proper dwell time, gas flow, and recoil management in full-length MCX rifles chambered in 5.56 NATO.

🔧 Key Features:

• ✅ OEM SIG SAUER Component – Built specifically for the MCX Virtus 5.56 NATO platform with 16″ barrels.

• ⚙️ Optimized Gas Regulation – Provides consistent cycling in suppressed or standard configurations.

• 🔁 Drop-In Replacement – Restore your MCX to factory performance with zero guesswork.

• 🧱 Heat-Treated Steel Construction – Built to endure high round counts, heat, and carbon buildup.

• 🔇 Cleaner Operation – Short-stroke piston system reduces fouling compared to direct impingement setups.

Included in the Kit:

• Complete Piston Assembly (for 16" 5.56 NATO MCX Virtus rifles)

This is a complete piston replacement. It must be installed as a unified assembly to ensure safe operation.

Technical Specifications:

⚠️ Critical Safety Information:

This part requires full disassembly of the upper receiver group and must be installed by a certified SIG SAUER armorer. Improper installation or substitution of parts can result in malfunction, serious injury, or death, and may void your firearm’s warranty.