5KU B-31C Upper Handguard for AK – Black

CNC Upper Handguard B-31C for AK
Looking for a durable and lightweight upper handguard that replaces the original polymer one while offering a full-length 20 mm RIS rail for optics and accessories? Need a precisely CNC-machined part that fits standard AK / AKM rifles? Want a long handguard that provides more mounting space while maintaining the rifle’s balance? Then the CNC Upper Handguard B-31C by 5KU is the perfect choice. This upper handguard is specifically designed for AK / AKM replicas with the B-30 lower handguard. Its precise CNC machining ensures a tight and secure fit, providing a stable platform for red dots and other accessories. The lightweight aluminum reduces weight compared to steel components while maintaining strength and balance — ideal for modern AK builds. The B-31C is compatible only with the B-30 lower handguard.

The B-30 lower handguard shown in the photo is for illustration only (sold separately).

Key Features

CNC-Machined Aluminum:Precisely crafted for perfect fit and long-lasting durability.
Integrated 20 mm RIS Rail:Standard mounting interface for red dots and tactical accessories.
Extended Length:Longer design offers more mounting options than the standard model.
Lightweight Construction:Weighs only about 130 g while maintaining high rigidity.
Front Sight Compatibility:Fits standard AK front assemblies; requires the B-30 lower handguard.
Modern Upgrade:Ideal for AEG AK / AKM replicas seeking a modern, tactical appearance.

Technical Specifications

Designed for: AK / AKM
Length: 195 mm
Weight: 130 g
Material: CNC-machined aluminum

Package Includes

CNC Upper Handguard B-31C for AK