The B5 Systems Sierra K Receiver Extension is a premium buffer tube designed specifically for use with the B5 Systems Sierra K stock system. Machined to military specifications and finished in a rugged black anodized coating, this extension provides a strong, stable interface for compact and short-barreled AR platforms. Its minimalist design and durable construction make it a trusted choice for tactical shooters and modern rifle builders.
This extension is built from high-grade aluminum for optimal strength-to-weight performance and is precision-machined to ensure a proper fit with the Sierra K stock. The sleek profile reduces unnecessary bulk, making it ideal for compact builds where weight and form factor matter. Finished in matte black, it resists corrosion and wear, ensuring lasting durability in both range and field environments.
B5 Systems Sierra K Receiver Extension Specifications
Manufacturer: B5 Systems
Model: Sierra K Receiver Extension
Fit: B5 Systems Sierra K Stock
Color: Black
Material: High-grade aluminum
Finish: Hardcoat anodized
Application: AR-15 rifles and pistols using Sierra K configuration
More Information
Condition
New in Box
Finish Per Color
Black
Manufacturer
B5 Systems
Manufacturer Part Number
SRK-1655
Model
Sierra K Receiver Extension
Type
Stocks
UPC
814927024748
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
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