B5 Systems SRK-1655 Sierra K Stock – Black, ODG, Coyote Brown (Mil-Spec)
The B5 Systems SRK-1655 Sierra K Stock offers a sleek, ultra-compact, and rugged upgrade for your mil-spec AR-15. Designed for mobility, stability, and minimalism, the Sierra K is ideal for shooters who want a low-profile stock without sacrificing durability or sling adaptability. Available in Black, OD Green, and Coyote Brown, this stock is built to blend with tactical setups.
The B5 Sierra K is a streamlined stock designed for those who prefer compact control and lightness in their AR platform. A minimalist version of the popular Bravo Stock, the Sierra K omits extra weight while maintaining military-grade toughness and a snag-free design.
Whether you’re building an SBR, a truck gun, or a duty rifle, the Sierra K stock keeps your platform tight, fast, and easy to maneuver.
Key Features of B5 Systems SRK-1655 Sierra K Stock – Black, ODG, Coyote Brown (Mil-Spec)
✅ Minimalist Profile for CQB Use
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Ultra-short length makes it ideal for short-barreled rifles
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Snag-free, smooth contours for tight gear loadouts
✅ Mil-Spec Compatibility
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Fits all mil-spec diameter buffer tubes
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Secure, wobble-free fit with precise tolerance control
✅ Rugged Construction
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Made from high-strength polymer
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Reinforced stress points and impact-resistant material
✅ Sling-Ready Design
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Includes M4-style sling loop
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Ambidextrous QD sling mount socket for flexible carry options
✅ Color Options for Tactical Matching
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Available in:
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Black – classic tactical look
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ODG (Olive Drab Green) – traditional field green
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Coyote Brown (CB) – desert and urban camo compatible
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Technical Specifications for B5 Systems SRK-1655 Sierra K Stock – Black, ODG, Coyote Brown (Mil-Spec)
| Feature | Details |
|---|---|
| Brand | B5 Systems |
| Model | SRK-1655 Sierra K |
| Platform | AR-15 / AR-platform rifles |
| Tube Compatibility | Mil-Spec only |
| Length of Pull | Approx. 10.2″–13″ (adjustable via buffer tube) |
| Weight | Approx. 7 oz |
| Material | Reinforced polymer |
| Mounting Options | QD sling socket, M4 loop |
| Available Colors | Black, OD Green, Coyote Brown |
| Country of Origin | Made in the USA |
Why Choose the B5 Sierra K Stock?
The Sierra K Stock is perfect for shooters seeking a minimalist stock without sacrificing toughness, reliability, or sling support. Whether you’re customizing a lightweight patrol rifle, building a home defense SBR, or simply trimming your AR weight, the Sierra K brings the essentials in a tight package.
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Ideal for CQB and tight environments
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⚙️ Compatible with mil-spec buffer tubes
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Supports QD and traditional sling options
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Built tough, backed by B5 Systems’ reputation
Frequently Asked Questions
Q: Will the Sierra K fit commercial buffer tubes?
A: No, it’s designed specifically for mil-spec diameter buffer tubes only.
Q: Is the sling mount truly ambidextrous?
A: Yes, the QD socket is positioned for right- or left-handed shooters.
Q: How does this compare to the B5 Bravo stock?
A: The Sierra K is a lighter, more compact version of the Bravo—great for streamlined builds.
Q: Is this stock adjustable?
A: The adjustment depends on the buffer tube, not the stock. It slides along mil-spec tubes with multiple length positions.
Upgrade your AR with the B5 Sierra K SRK-1655 Stock—a compact powerhouse designed for speed, comfort, and combat-ready durability. Choose your tactical color, lock it in place, and run your rifle lean and mean.
Order now in Black, OD Green, or Coyote Brown for your next minimalist AR build.
Also Available :
FAB Defense AR-15 Buttstock – Compact, Cheek Rest, Mil-Spec & Commercial Fit
CMMG Receiver Extension and Stock Kit – A1, Mk3
FAB Defense AR-15 Buttstock with Adjustable Cheek Rest – Fits Mil-Spec & Commercial Buffer Tubes
FAB Defense GL-CORE AR-15 Buttstock – Fits Mil-Spec & Commercial Buffer Tubes
Sylvan Arms Gen4 Folding Stock Adapter – Right Fold for AR10/AR15/AR9
DoubleStar Ace Folding Stock Mechanism with Integrated AR-15 Stock Interface
Magpul ACS – Adaptable Carbine Stock for Mil-Spec AR-15/M16 Platforms
Magpul CTR – Compact Type Restricted Stock for Mil-Spec AR-15/M16
SB Tactical SBA5 Brace – 10.25 Length, AR-Platform Compatibility
| Color | Black, Odg, Cb |
|---|
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