Overview of the SIG SAUER MCX/MPX Collapsible Stock Rifle Upgrade | STOCK-X-COLLAPSIBLE-BLK
Rapid Deployment and Modular Design
The SIG SAUER MCX/MPX Collapsible Stock provides a streamlined solution for shooters who need to transition between compact storage and a stable firing platform. Designed specifically for the MCX and MPX platforms, this factory telescoping stock installs quickly via the standard 1913 interface on your receiver. Whether you are navigating tight spaces or seeking a customized fit, the STOCK-X-COLLAPSIBLE-BLK offers three distinct length-of-pull positions to match your gear and body type.
Built for the Modern Operator
This authentic SIG SAUER component is engineered for durability and tactical efficiency. The dual-rod design ensures a rigid lockup while maintaining a slim profile that does not interfere with the controls of your firearm. Law enforcement officers and tactical enthusiasts appreciate the smooth operation of the adjustment button, which allows for rapid extension when every second counts. With a fully collapsed length of just 4 and 1/16th inches and a maximum extension of 8 inches, this stock transforms your platform into a highly adaptable tool for any environment.
Key Features
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1913 Interface: Attaches securely to the rear Picatinny rail section found on MCX and MPX receivers for a rock-solid fit.
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Adjustable Length of Pull: Features three distinct positions to accommodate different arm lengths and body armor configurations.
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Dual-Rod Construction: Two heavy-duty steel rods provide superior lateral stability compared to single-rod designs.
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Textured Buttpad: The rear of the stock features a rubberized, vertically-ribbed texture and an embossed SIG logo for maximum grip against the shoulder.
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Integrated Sling Mount: Includes a built-in attachment point for quick-detach (QD) sling swivels, allowing for easy carry and transitions.
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Compact Footprint: Measuring only 1 inch between the rods, the STOCK-X-COLLAPSIBLE-BLK maintains the sleek lines of your firearm.
Compatibility
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Primary Models: SIG MCX, SIG MCX-SPEAR, and SIG MCX-SPEAR LT.
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Submachine Gun and Pistol Platforms: SIG MPX.
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Mounting Requirements: Requires a vertical 1913 (Picatinny) rail interface at the rear of the receiver.
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Regulatory Note: Please verify local and federal laws regarding short-barreled rifles (SBR) before installing this stock on a pistol-length firearm.
Intended Users
Law Enforcement Professionals
Tactical teams and patrol officers use this stock to keep their duty weapons compact for vehicle storage while ensuring they can deploy a stable shouldered platform during high-stress incidents.
Competitive Shooters
The three-position adjustment allows sport shooters to find the perfect eye relief for optics, ensuring a consistent cheek weld and faster follow-up shots during dynamic matches.
Enthusiasts and Collectors
Owners of SIG SAUER MCX or MPX rifles choose this factory part to maintain the authentic look and feel of their firearm while adding the functional benefit of a collapsible footprint.
What’s Included
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(1) SIG SAUER MCX/MPX Collapsible Stock (Black)
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Integrated 1913 Rail Mounting Hardware
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Factory Installation Instructions
Frequently Asked Questions about MCX/MPX Collapsible Stock
Question 1
How many adjustment positions does this stock have?
This SIG SAUER stock features three distinct length-of-pull positions, allowing you to choose between fully collapsed, intermediate, or fully extended lengths.
Question 2
Will this stock fit on a standard AR-15 buffer tube?
No, this stock is designed specifically for firearms with a 1913 Picatinny rail interface at the rear of the receiver, such as the SIG MCX or MPX series.
Question 3
What is the total length of the stock when fully extended?
The stock reaches a maximum length of 8 inches when fully extended and collapses down to 4 and 1/16th inches for a more compact profile.
Question 4
Does this stock include a point for attaching a sling?
Yes, the stock is equipped with an integrated attachment point designed to accept standard quick-detach (QD) sling swivels.
Question 5
Is any special tool required for the installation?
The stock installs onto a 1913 rail interface; while basic hand tools are typically needed to tighten the mounting bolt, no permanent modification to the receiver is required.
Why Buy from WCUniforms
WCUniforms is owned and operated by a team of veterans from the USMC and USCG, as well as former law enforcement officers and EMTs. We do not just sell gear; we have used these products in the field and understand the importance of reliability. When you shop with us, you benefit from our hands-on experience and commitment to service. Most orders ship the same day, and our goal is to get your gear moving within 48 business hours for all in-stock items. We offer a hassle-free 30-day return policy and provide real human support via phone at 855-452-4440 or through our instant chat during business hours. Stay informed with SMS and email tracking updates for every order you place.
MPN: STOCK-X-COLLAPSIBLE-BLK
UPC: 798681544073
