B5 Systems AK Stock 4.5mm Black

The B5 Systems AK Stock is designed for AK platforms using a factory 4.5mm folding trunnion and mounts through the factory 4.5mm pin. It combines adjustable length of pull with sling-mount options, an optic rail cutout, and a cushioned nonslip buttpad.

Made in the USA from composite material with steel hardware, this stock provides a practical replacement option for compatible AK configurations. Fitment may be required because of tolerance differences among manufacturers.

Key Specifications

• This stock is designed for AK platforms with a factory 4.5mm folding trunnion.
• The stock provides a collapsible five-position length-of-pull adjustment.
• The stock is finished in black.
• The design includes an optic rail cutout.
• A cushioned nonslip buttpad supports stable shoulder contact.
• The stock includes fixed sling mounts and steel anti-rotational QD mounts.
• The construction uses composite material and steel hardware.
• The listed weight is 12.5 ounces.
• The listed dimensions are 9 inches long by 1.2 inches wide by 4.33 inches high.
• Installation uses the factory folding trunnion and 4.5mm pin, with fitment potentially required.

With its adjustable fit, integrated mounting options, and durable composite construction, this B5 Systems stock offers a well-specified upgrade path for compatible AK platforms while retaining the factory folding-trunnion interface.