B5 Systems Sierra K Stock, Black

The B5 Systems Sierra K is a purpose‑driven compact stock designed for PDW and short AR platforms. Built from durable polymer and engineered for a slim profile, it provides a low‑profile cheek weld and snag‑resistant controls for close‑quarters handling. The Sierra K mounts to a shortened compact Mil‑Spec receiver extension and includes integrated sling fittings and tensioning features for secure, repeatable performance. Lightweight and compact, it suits users who need a minimal, efficient stock for compact rifles.

Key Specifications

• The product type is Stock.
• The model is Sierra K.
• The stock fits AR Rifles.
• The finish color is Black.
• The frame material is Polymer.
• The weight is 6.6 oz.
• The height measures 3.8 inches.
• The width measures 1.5 inches.
• Mounting is via a shortened compact Mil‑Spec receiver extension.
• Features include a slim cheek profile, snag‑free adjustment lever, limited‑rotation QD, integral fixed sling mounts, internal tensioners, and an anti‑slip buttpad.

Compact, tough, and practical, the Sierra K stock gives compact AR platforms a low‑profile, well‑engineered interface that emphasizes reliability and function. Its lightweight polymer construction and purpose‑driven feature set make it suitable for users seeking a minimal, durable stock for PDW or short‑length systems.