B5 Systems Enhanced SOPMOD Stock - Fits Mil-Spec Receiver Extension Tubes, Dual Integrated Battery Storage Tubes, Built-in Steel QD Sling Swivel Mount, Matte Black Finish - SOP-1074 / 0814927020009
Product Description
Upgrading a multi-role carbine, hard-use tactical rifle, or professional duty firearm framework requires a rear interface that balances stabilization with a solid cheek profile. Low-tier commercial stocks often introduce annoying rattle and side-to-side wobble on your buffer tube, while minimalist options force your neck into unnatural angles that disrupt your sight picture on your bench. The **B5 Systems® Enhanced SOPMOD Stock (SOP-1074 / 0814927020009)** completely flatlines these stability and positioning constraints. It delivers a combat-proven **extended cheek weld structure** engineered directly from crane military blueprints.
Proudly molded and field-tested in the United States by B5 Systems, this high-performance stock is crafted from an impact-resistant, heat-mitigating **advanced polymer alloy** finished in a non-reflective matte black. Designed to slide cleanly onto standard mil-spec receiver extension tubes, the signature feature is its flared sides, which host **dual water-resistant battery storage tubes** perfect for holding CR123 or AA cells. The sloping design creates a wider cheek surface, helping armorers achieve a fast, natural alignment with red dots or variable power optics. Complete with an integrated, rotation-limited **steel quick-detach (QD) swivel mount** and a cushioned, non-slip rubber buttpad, this turn-key tactical upgrade enhances weapon handling straight from your workbench.
Engineered to lock smoothly onto standard six-position receiver extensions, this factory-built stock ensures absolute mechanical stability directly from your workspace bench.
*Armorer Bench Notes & Real-World Receiver Extension Staging Guidance: The B5 Systems SOP-1074 upgrade assembly arrives workspace ready, securely wrapped in factory original inventory retail packaging card blocks. PROPRIETARY MIL-SPEC TUBE INTERFACE MATRIX: The internal guide tracking channel is engineered natively, strictly, and precisely to fit **standard mil-spec receiver extension buffer tubes (approx. 1.14-inch diameter)**. *Commercial Buffer Tube Alignment Checklist:* Prior to staging on your bench, check your extension tube frame geometry. If your host rifle features a commercial buffer tube with an angled rear end and a wider **1.17-inch outer diameter shell**, this mil-spec configuration will not slide on. Armorer Workbench Custom Staging Sequence: 1. Visually and physically confirm your host firearm platform is completely clear of live ammunition, the magazine is separated, and the chamber area is empty and safe. 2. Wipe down the external tracking lanes of your receiver extension tube with a dry cloth to clear away extra grease layers. 3. Squeeze the lower textured cross-pin release lever downward, then pull the center locking pin entirely down to open up the tracking channel channel blocks. 4. Slide the SOPMOD stock housing horizontally forward onto the buffer tube tracking lane from the rear. 5. Release the cross-pin lever to let the heat-treated lock pin click into one of the positional setting holes. 6. Unthread the rear knurled caps on the storage tubes to check that the internal rubber gaskets are seated cleanly before storing reserve batteries for use downrange.*
Key Features
- Enhanced SOPMOD Cheek Weld: Features a wide, sloped top surface that offers a larger cheek weld area than standard stocks, ensuring fast eye alignment with your optic layout.
- Dual Water-Resistant Storage: Outfitted with built-in storage tubes on both sides that seal tight with rubber O-rings, keeping spare batteries dry and secure in rough weather.
- Rugged Anti-Rotation QD Mount: Outfitted with a heavy-duty steel quick-detach socket that prevents sling twisting by keeping the swivel from rotating freely.
- Premium Duty Polymer Build: Molded from high-tensile, color-matched polymer alloy that resists hard impacts, chemical solvents, and extreme temperatures on the trail.
- Non-Slip Rubber Buttpad: Fitted with an ergonomic black rubber buttpad that cushions recoil impulses while latching onto body armor or web gear securely.
- Snag-Free Shielded Lever: The positional adjustment lever is nestled cleanly inside the structural lower ribs, preventing it from catching on gear straps or brush.
Product Specifications
- Brand: B5 Systems® (Xenia, Ohio / Made Proudly in the USA)
- Model Line: High-Performance Tactical Stocks & Mil-Spec Receiver Accessories
- MPN/SKU Code: SOP-1074 (Enhanced SOPMOD Mil-Spec Specification Base SKU)
- UPC Code Profile: 0814927020009 / 814927020009
- Receiver Extension Matching: Standard Mil-Spec Dimension Buffer Tubes Natively (~1.14\" Outer Profile)
- Internal Payload Storage: 2x Built-In Water-Resistant Storage Bays (Fits 2x CR123A or 2x AA Cells per Side)
- Sling Attachment Framework: Integrated Anti-Rotation Steel QD Swivel Pocket | Fixed Rear Webbing Slot
- Structural Material Base: Advanced Weatherproof High-Impact Mil-Spec Synthetic Polymer Alloy
- Exterior Surface Protection: Non-Reflective Matte Black Solid Infused Tactical Dye Coloring
- Buttpad Element Base: Removable High-Traction Shock-Mitigating Black Injection Rubber Cushion
- Full Kit Component Checklist: 1x Complete Assembled Enhanced SOPMOD Stock Frame Module Only
- Packaging Format Class: Factory Original Sealed B5 Systems Retail Header Packaging Envelope Card
- Product Type Category: Rifle Accessories / Adjustable Buttstocks & Custom Lower Furniture
- Overall Structural Component Width: ~2.40 Inches (~61.0 mm Wide SOPMOD Cheek Saddle Flanks)
- Overall Physical Component Length: ~7.40 Inches (~187.9 mm Linear Structural Buffer Tube Depth)
- Net Component Module Mass: ~11.85 Ounces (~335.9 Grams Lightweight Structural Armor Weight)
- Global Quality Certifications: Sourced Natively to Match United States Military Operational Requirements
- Warranty Tracking Protection: Fully Backed by B5 Systems Factory Material Performance Guarantee
