Sig Sauer MCX/MPX Low-Profile Stock Assembly with Magpul SL-K Stock - Tactical Upgrade

The Sig Sauer MCX/MPX low-profile stock assembly pairs a folding buffer tube with a Magpul SL-K stock to give your modern tactical rifle a compact, mission-ready profile. Built for the MCX and MPX platforms, this assembly is a straightforward swap for shooters who want to cut down sight radius, improve maneuverability in tight spaces, or reduce overall length for transport and storage. The side-folding design locks securely when deployed and folds flat when not in use—ideal for operators running short-barreled rifles or working from vehicles, boats, or confined positions.

The Magpul SL-K stock is proven in the field for its low-profile geometry and positive lock-up. Its minimal length of pull and compact footprint make it especially useful in tactical, home-defense, and specialized hunting applications where a full-size stock would slow you down or catch on gear. The assembly arrives as a ready-to-install unit, so you're not sourcing individual components or wrestling with headspace concerns.

This is the right choice if you're running an MCX or MPX and need a lighter, more agile setup without sacrificing stability. Whether you're a competitive shooter, a professional end-user, or someone who values adaptability in the field, a low-profile, folding stock makes your rifle faster to deploy and easier to stow.

Key Features

• Fits Sig Sauer MCX and MPX rifle platforms
• Magpul SL-K stock with low-profile design for reduced sight radius and compact handling
• Side-folding mechanism for quick reconfiguration and storage
• Folding buffer tube for MCX/MPX compatibility
• 1913 Picatinny mounting interface for accessories and attachments

Specifications

Frequently Asked Questions

Will this fit my MCX or MPX?

Yes. This assembly is designed specifically for the Sig Sauer MCX and MPX platforms. The folding buffer tube and mounting hardware are engineered to mate with both rifle models.

What comes in the box?

The assembly includes the folding buffer tube and the Magpul SL-K stock as a complete unit. Everything needed to install the stock on a compatible MCX or MPX is included.

Can I attach accessories to the Picatinny rail?

Yes. The stock features 1913 Picatinny mounting, so you can add rail-mounted accessories, sights, or other gear as needed.

Why choose a low-profile, folding stock?

A low-profile stock reduces your rifle's overall length and sight height, making it faster to handle in close quarters, easier to stow in vehicles or bags, and lighter on the shoulder in tactical and defensive scenarios. The side-folding design folds flat when you don't need it extended, so you gain versatility without sacrificing stability when deployed.