B5 Systems SOPMOD Sierra K Stock ODG - Mil-Spec AR-15/M4

The B5 Systems Sierra K Stock delivers the proven SOPMOD design in a compact configuration that reduces overall weapon length without sacrificing functionality. This Olive Drab Green variant maintains the same robust construction and adjustability that made the original SOPMOD stock a military standard.

What Makes This Different

The Sierra K features a shortened buttstock length that reduces pull length by 0.75 inches compared to standard SOPMOD stocks. This compact design improves maneuverability in confined spaces while retaining dual waterproof storage compartments and multiple sling attachment points. The reinforced polymer construction withstands impacts that would crack traditional stocks.

Key Features

• Shortened length of pull reduces overall weapon profile by 0.75 inches
• Dual sealed storage compartments protect batteries and small parts
• Reinforced polymer construction with textured grip surfaces
• Six-position mil-spec buffer tube compatibility
• Multiple QD sling swivel attachment points
• Anti-rattle lock mechanism eliminates buffer tube play
• Olive Drab Green finish matches military specifications

Field performance validates the Sierra K's design across multiple environments. The shortened profile excels in vehicle operations and close-quarters scenarios where standard stocks prove cumbersome. Sealed compartments maintain weatherproof integrity during extended deployments, while the textured surfaces provide secure grip even with wet or gloved hands.

Technical Specs

• Length of Pull: 10.75 to 14 inches (6-position adjustment)
• Weight: 11.2 ounces
• Material: Reinforced polymer construction
• Compatibility: Mil-spec carbine buffer tubes
• Storage: Two waterproof compartments
• Sling Points: QD compatible attachment points
• Finish: Olive Drab Green (ODG)
• Country of Origin: United States

The Sierra K Stock represents proven SOPMOD engineering in a mission-specific package. Military contractors and civilian operators choose this stock when space constraints demand a shorter profile without compromising the features that make SOPMOD stocks the professional standard.