Sig Sauer ADAPTERXFOLD MCX/MPX Folding Stock Adapter 1913 Rail

The Sig Sauer ADAPTERXFOLD transforms MCX and MPX pistol platforms by enabling the attachment of folding stocks to existing stabilizing brace setups. This precision-machined adapter creates a reliable interface between 1913 Picatinny rail systems and aftermarket folding stock mechanisms. The black anodized finish matches factory Sig Sauer components while providing enhanced corrosion resistance.

What Makes This Different

Unlike universal adapters that require modification or compromise fit, the ADAPTERXFOLD is purpose-built for MCX and MPX platforms. The knuckle design allows 180-degree folding capability while maintaining structural integrity under recoil forces. CNC machining from 6061-T6 aluminum ensures dimensional consistency and long-term durability. The integrated locking mechanism prevents accidental deployment during transport or storage.

Key Features

• Direct compatibility with MCX and MPX pistol receivers without modification
• 1913 Picatinny rail interface accommodates standard folding stock systems
• 180-degree folding range reduces overall length by approximately 6-8 inches
• 6061-T6 aluminum construction with Type III hard anodized finish
• Positive locking mechanism secures folded and extended positions
• Low-profile design maintains sight picture and accessory clearance
• Tool-free operation with ambidextrous release button

Field performance demonstrates consistent lockup under rapid fire conditions with both 5.56 NATO and 9mm loadings. The adapter maintains zero retention when properly torqued to manufacturer specifications. Law enforcement agencies report reliable function through thousands of training rounds without mechanical failure. The folding mechanism operates smoothly in temperatures ranging from -20°F to 140°F.

Technical Specs

• Material: 6061-T6 aluminum alloy
• Finish: Type III hard anodized black
• Weight: 3.2 ounces
• Overall length: 4.25 inches extended
• Rail interface: 1913 Picatinny standard
• Folding range: 180 degrees
• Compatible platforms: MCX, MPX pistol variants
• Installation: No gunsmithing required
• Country of origin: USA

The ADAPTERXFOLD represents the most direct path to folding stock capability on MCX and MPX platforms. Professional users appreciate the robust construction and reliable operation under demanding conditions. Stock levels fluctuate due to consistent demand from both civilian and professional markets.