Sig Sauer MCX Upper Receiver Assembly, Gen2, Semi Auto – Gray
Not Yet Rated | Write the First Review SKU: 222-SIG-KIT-MCX-UPPER-SEMI-GRY
UPC: 799000000000
MFG#: KIT-MCX-UPPER-SEMI-GRY

Sig Sauer MCX Upper Receiver Assembly, Gen2, Semi Auto – Gray

Precision-Built Upper for MCX Modularity | Factory OEM | Gray Anodized Finish

Elevate your MCX rifle build with the Sig Sauer MCX Upper Receiver Assembly, Gen2, Semi Auto – Gray. Crafted by Sig Sauer, this factory-original upper receiver offers uncompromising quality and compatibility with MCX Gen2 rifles chambered in .223 Rem, 5.56x45mm NATO, or .300 Blackout. Whether you're assembling a new rifle or upgrading an existing one, this upper delivers precision, durability, and the distinct aesthetics of a sleek gray anodized finish.

🔧 Key Features:

• ✅ Factory Sig Sauer OEM – Guaranteed fit and function for Gen2 MCX rifles.

• 🔩 Gray Anodized Aluminum Housing – Lightweight, corrosion-resistant, and visually striking.

• ⚙️ Includes:

  • Upper Receiver Housing

  • Forward Assist Assembly

  • Ejection Port Cover

  • Barrel Clamp Assembly

  • Feed Ramp Insert

  • Cam Path Insert

• 🧱 Picatinny Top Rail – Ready for optics, sights, and mission-specific attachments.

• 🔁 Compatible With Multiple Calibers – .223 Rem, 5.56 NATO, and .300 BLK MCX builds.

• ⚠️ Excludes Barrel, BCG, Bolt, Charging Handle – Add your preferred components to finish your upper.

Designed for Versatility, Built for Performance

The MCX Gen2 upper receiver features an enhanced design that supports Sig’s renowned modularity and precision. It’s the perfect foundation for custom builds—whether you’re outfitting a suppressed 300 BLK pistol, a 5.56 mid-range carbine, or a .223 defensive setup.

The gray finish offers not just aesthetic appeal but also rugged field performance with hard-coat anodizing for increased wear resistance.

Product Compatibility: