B5 Systems Sierra K SRK1656 Stock FDE

The B5 Systems Sierra K is a purpose-driven compact stock designed for use on PDW and other compact weapon systems. It reduces overall size and presents a slim cheek profile for comfortable, low-profile carriage. The stock includes a snag-free adjustment lever, limited-rotation QD, integral fixed sling mounts, internal tensioners, and an anti-slip buttpad. It mounts via a shortened compact Mil‑Spec receiver extension for straightforward installation on compatible AR rifles.

Key Specifications

• The model is Sierra K.
• The color is Flat Dark Earth.
• The stock is designed to fit AR Rifles.
• The product type is Stock.
• The weight is 6.60 oz.
• The length measures 5.63 inches.
• The width measures 1.50 inches.
• The height measures 3.80 inches.
• Mounting is via a shortened compact Mil‑Spec receiver extension.
• Included features are slim cheek profile, snag-free adjustment lever, limited-rotation QD, integral fixed sling mounts, internal tensioners, and an anti-slip buttpad.

Lightweight and compact, the Sierra K balances reduced profile with practical control for close-quarters and compact-system configurations. Its slim lines and integrated mounting options make it a sensible choice for shooters seeking a low-profile stock that preserves handling and stability in tight setups.