Sig Sauer MCX, MPX Low-Profile Stock Assembly

• Low-profile folding design: The slim side-folding layout keeps the rifle compact for transport and storage while preserving a solid shoulder stock when deployed.
• MCX and MPX compatibility: Built for SIG Sauer MCX and MPX platforms, this stock assembly gives these rifles and carbines a factory-style fit that matches the system’s folding-stock architecture.
• Skeletonized construction: The streamlined profile reduces unnecessary bulk, helping maintain quick handling without making the rear of the firearm feel heavy or cumbersome.
• Stable lock-up: A locking folding mechanism helps the stock stay secure in use, which supports more consistent cheek placement and steadier shooting.
• Accessory-grade replacement assembly: As a complete stock assembly, it is suited to replacing a worn unit or configuring a build around a compact, practical rear stock solution.

About the MCX and MPX Series

The SIG Sauer MCX and MPX families are built around compact, modular firearm platforms that place a strong emphasis on adaptability. Within the SIG Sauer lineup, these series are known for combining modern controls with configurations that suit duty use, range work, and specialized builds where overall length and handling matter. A key trait of the platform is its ability to use folding rear assemblies, which gives the rifle or carbine a more compact footprint without giving up the support of a shoulder stock.

Across the series, the design philosophy centers on modularity, compact transport, and practical ergonomics. That makes MCX and MPX accessories especially important, because the right stock changes how the firearm carries, shoulders, and balances. Low-profile stock options are particularly relevant for users who want a cleaner rear profile than a bulkier adjustable design. In that role, a folding stock assembly fits the character of the platform well: it keeps the package easier to stow, preserves the streamlined look of the firearm, and supports the quick handling that has made the MCX/MPX platform popular for compact rifle and carbine setups.

About the Sig Sauer MCX, MPX Low-Profile Stock Assembly

The Sig Sauer MCX, MPX Low-Profile Stock Assembly is designed for shooters who want a compact rear stock solution that matches the handling style of the MCX and MPX platform. Its defining feature is the low-profile, side-folding format, which reduces the firearm’s overall length for storage, transport, or movement in confined spaces, while still providing the support of a shoulder stock when opened. That makes it a practical choice for compact rifle builds where portability matters just as much as control on the shoulder.

The slim, skeletonized shape keeps visual and physical bulk to a minimum. In practical use, that means the rear of the firearm stays trim and easy to manage, which helps preserve the quick, lively feel these SIG Sauer platforms are known for. Rather than adding unnecessary mass, the design focuses on giving the shooter a stable contact point without making the firearm feel oversized or rear-heavy.

The assembly is also well suited to replacement or upgrade use. Because it is made specifically for MCX and MPX compatibility, it aligns with the platform’s folding-stock concept instead of forcing a generic solution onto a specialized firearm. The result is a stock assembly that supports compact carry, cleaner handling, and a more streamlined overall build. For shooters setting up a practical SIG Sauer stock assembly for range, defensive, or general-purpose use, this model emphasizes simplicity, fit, and compact function.

About Sig Sauer

SIG SAUER traces its roots to a wagon factory established near the Rhine Falls in Switzerland in 1853. Today, SIG SAUER, Inc. is headquartered in Newington, New Hampshire, and the company produces a broad range of firearms-related equipment. Its catalog includes firearms, electro-optics, ammunition, airguns, and suppressors, reflecting a focus on complete shooting-system development rather than a single product category.

Within optics and shooting equipment, SIG SAUER is known for products such as riflescopes, red-dot sights, and rangefinders. That broader engineering background is relevant to firearm components as well, because the company develops accessories to work within the same platform logic as its rifles and carbines. The SIG SAUER name has been used since 2007, when SIGARMS adopted the current brand identity, and it remains closely associated with modern sporting, defensive, and tactical firearms systems.

Main Features

• Manufacturer: Sig Sauer
• Warranty: 2 years

Warranty

This SIG Sauer stock assembly is covered by a 2-year warranty.