The Sig Sauer Picatinny Stock Adapter (brand part no. 2401191-R) lets Sig MCX owners install a folding stock assembly on a rifle originally set up with a different buttstock interface. Sig Sauer engineers the adapter specifically for MCX folding stock hardware, giving builders a factory-correct way to upgrade to a folder without sourcing a full replacement rifle. This adapter is built for folding stock assemblies only and is not compatible with collapsible stocks or pistol braces.

Key Specifications

• Purpose-built for the Sig MCX platform.
• Enables installation of MCX folding stock assemblies.
• Not compatible with collapsible stocks or pistol braces.
• Weighs approximately 0.2 lb.

Frequently Asked Questions

What does this adapter allow? Installing MCX folding stock assemblies.

Will this work with a collapsible stock or brace? No, it is built for folding stock assemblies only.

Buy the Sig Sauer Picatinny Stock Adapter

Upgrade your Sig MCX to a folding stock setup. Order it from our small rifle parts selection at our Lubbock, Texas gun shop for fast, direct shipping.