Sig MCX Virtus Piston Assembly – 14″ Barrel | 5.56 NATO
Not Yet Rated | Write the First Review SKU: 222-SIG-KIT-MCX-PISTON-14B-556
UPC: 799000000000
MFG#: KIT-MCX-PISTON-14B-556

Sig MCX Virtus Piston Assembly – 14″ Barrel | 5.56 NATO

Mid-Length Barrel. Full-Spectrum Reliability. Factory-Certified Gas Control.

Maximize the operational efficiency of your Sig Sauer MCX Virtus rifle with the 14″ Barrel Piston Assembly—a factory OEM component engineered specifically for 5.56 NATO configurations. Whether you're running suppressed or unsuppressed, this short-stroke gas piston system ensures consistent cycling, cleaner operation, and reduced fouling—perfectly tuned for the dwell time and gas flow demands of a 14-inch MCX barrel.

If you’re replacing a worn piston, correcting gas system issues, or simply maintaining mission-ready performance, this SIG-designed piston is the trusted solution for professionals who rely on their MCX.

🔧 Key Features:

• ✅ Factory OEM SIG Sauer Part – Designed and manufactured specifically for 14" 5.56 NATO MCX Virtus rifles.

• ⚙️ Short-Stroke Gas System – Cleaner operation than DI systems; optimized for long-term durability.

• 🔁 Drop-In Replacement – Restore or maintain proper gas timing and cycling with factory precision.

• 🔇 Suppressor-Ready – Compatible with both subsonic and supersonic loads, suppressed or unsuppressed.

• 💪 Steel Construction – Black heat-treated finish resists carbon, corrosion, and heat stress.

What’s Included:

• Complete Piston Assembly
  (Designed for use as a full unit with 14" MCX barrels chambered in 5.56 NATO)

⚠️ Substituting or mixing parts may result in malfunction or damage.

Product Specifications:

⚠️ Installation Disclaimer:

Installation requires disassembly beyond field-stripping and must be performed by a certified SIG Sauer armorer. Improper installation or use of non-compatible components can lead to malfunction, injury, or death, and may void your firearm’s warranty.