#buttstock

Sureshot Armament Group

The B5 SOPMOD stock, produced by B5 Systems, is a modern refinement of the original SOPMOD stock developed under the Naval Surface Warfare Center Crane Division program, which standardized modular accessories for military carbines in the 1990s. Its design reflects both military heritage and contemporary improvements, making it one of the most widely recognized collapsible stocks for AR-platform rifles. The B5 version retains the recognizable enlarged cheek weld and storage features of the original while incorporating updated materials and ergonomics tailored for professional and civilian users alike.

In terms of dimensions, the B5 SOPMOD stock is compact yet substantial enough to provide stability. Typical specifications list a length of approximately 7.4 inches, a height near 4.9 inches, and a width of about 2.4 inches, with a weight around 11.8 ounces. These measurements place it in the mid-weight category for collapsible stocks, balancing robustness with manageable handling. The slightly increased width compared to minimalist stocks is intentional, as it enhances the cheek weld surface, allowing shooters to achieve a consistent sight alignment, particularly when using optics.

The materials used in the B5 SOPMOD are a major contributor to its reputation. The body is constructed from reinforced, mil-spec polymer, which offers a strong combination of rigidity, impact resistance, and reduced weight. This polymer is designed to withstand harsh environmental conditions such as temperature extremes, moisture, and rough handling. Complementing the polymer body are steel components, including anti-rotation quick detach sling mounts and internal hardware, which add structural integrity in high-stress areas. The buttpad is typically made of a non-slip rubber material, improving shoulder grip and recoil management.

Durability is one of the defining traits of the B5 SOPMOD stock. Its reinforced polymer construction resists cracking and deformation under impact, while the steel hardware ensures long-term reliability of mounting points and adjustment mechanisms. The stock is also designed with streamlined contours to minimize snagging on gear or vegetation, a feature originally intended for military use but equally beneficial for civilian applications. Additionally, the inclusion of water-resistant storage compartments demonstrates practical durability, as these compartments can securely hold batteries or small tools without exposure to moisture.

Versatility is another key strength. The B5 SOPMOD is compatible with mil-spec carbine receiver extensions, making it suitable for a wide range of AR-15 and M4-style rifles. Its adjustable length of pull allows users to tailor the rifle’s fit to different shooting positions, body armor configurations, or personal preferences. The integrated dual storage tubes can hold items such as CR123 or AA batteries, which is particularly useful for optics or weapon lights. Sling mounting options, including both fixed slots and QD sockets, further expand its adaptability for different carry methods.

From a value perspective, the B5 SOPMOD sits in the mid-to-premium range of AR-15 stocks, but it justifies its price through a combination of durability, ergonomic comfort, and feature set. While simpler stocks may be lighter or less expensive, they often lack the storage capability, cheek weld quality, and rugged construction that define the SOPMOD design. The stock’s long service life and proven performance in military and civilian contexts contribute to its overall value, especially for users who prioritize reliability and comfort over minimalism.

Overall, the B5 SOPMOD buttstock represents a well-balanced design that emphasizes durability, user comfort, and functional versatility. Its dimensions and materials are carefully chosen to support consistent shooting performance, while its features reflect real-world operational needs. Whether used in professional settings or recreational shooting, it remains a benchmark for what a modern collapsible rifle stock can offer.

The B5 System SOPMOD Buttstock can be located at Brownells:

Ultradyne has announced the release of their UD Lightweight Butt Stock for the AR-15 pattern. Ultradyne states “Introducing the UD Lightweight Butt Stock, crafted from solid 6061 T6 aluminum for optimal balance between weight and strength. Engineered for lightweight rifle builds without compromising durability. Adjustable in Length of Pull (LOP) from 13″ to 14″ with removable spacers, and four…