B5 Systems Sierra K Stock — Coyote Brown

The B5 Systems Sierra K is a purpose-driven compact stock designed primarily for PDW and compact weapon systems. It offers a reduced overall size and a slim cheek profile to support compact builds where minimal bulk is required. The design includes a snag-free adjustment lever, limited-rotation QD and integral fixed sling mounts, internal tensioners, and an anti-slip buttpad. The Sierra K mounts via a shortened compact Mil-Spec receiver extension.

Key Specifications

• The model is Sierra K.
• Designed to fit AR Rifles.
• The color is Coyote Brown.
• The product type is Stock.
• The height is 3.80″.
• The length is 5.63″.
• The weight is 6.60 oz.
• The width is 1.50″.
• Mounts via 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.

With its compact footprint and several user-focused features, the Sierra K is well suited for compact AR builds and PDW-configured platforms where space and snag resistance matter. Its slim profile and integrated mounting options provide a practical, function-first upgrade for shooters seeking a reliable, low-profile stock.