Call us: 0522 17 00 488

B-31L Style Aluminum Upper Handguard for AK Series - 5KU

49.90

Tax included Product made to order generally delivered in 7/10 working days.

LONG upper handguard in Zenitco B-31L style, manufactured by 5KU. Made of robust CNC aluminum, this gas tube cover extends for 19.8 cm, providing a low-profile 20mm Picatinny rail along its entire length.

It is specifically designed to be mounted in combination with the extended lower handguard assembly (e.g., B-10L + DL-1), creating a monolithic and aggressive "Sport" front end. Compatible with AKM / AK74 / AK105 series (GHK, LCT).

Size Guide

This is an approximate conversion table to help you find your size. If you have already purchased an item from our brand, we recommend you select the same size indicated on its label.

Men's Sizes

International	XS	S	M	L	XL	XXL	XXXL
Europe	32	34	36	38	40	42	44
US	0	2	4	6	8	10	12
Chest Circumference (inches)	33-35"	36-38"	39-41"	42-44"	45-47"	48-50"	51-53"
Chest Circumference (cm)	84-89	91-97	98-104	107-112	114-119	122-127	129-134
Waist Circumference (inches)	28"	30"	32"	34"	36"	38"	40"
Waist circumference (cm)	71	76	81	86	91.5	96.5	101.5

LOWA FOOTWEAR SIZE CHART

SIZE SELECTION:

THE SIZES IN THE DROP-DOWN MENU ARE UK SIZES (ENGLISH)

conversion chart: UK size - (IT size) - size in mm

Size 6.5 (40) 257mm

Size 7 (40 3/4) 262mm

Size 7.5 (41.5) 266mm

Size 8 (42) 270mm

Size 8.5 (42.5) 274mm

Size 9 (43 1/4) 278mm

Size 9.5 (44) 283mm

Size 10 (44.5) 287mm

Size 10.5 (45) 291mm

Size 11 (46) 295mm

Size 11.5 (46.5) 300mm

Size 12 (47) 304mm

Size 12.5 (48) 308mm

Size 13 (48.5) 312mm

NEED ADVICE ON CHOOSING A SIZE?

Take one of your sneakers and look at the size in mm or cm, look at the diagram above to see what it corresponds to and order your size!

e.g., your sneaker is 27.2 cm long? Great, the closest and most correct size will be: "TG 8.5 (42.5) 274mm", in the purchase menu select size 8.5UK!

Real time: 1 Visitor right now

By buying this product you can collect up to 4 loyalty points. Your cart will total 4 points that can be converted into a voucher of 0.80.

Description
Product Details

This 5KU component is a replica of the B-31L extended upper handguard (often marked by the manufacturer as B-31N), an essential piece to complete long "Zen-style" tactical kits. It is entirely machined from CNC Aluminum to ensure maximum robustness and a solid attachment.

The B-31L is a gas tube cover that extends for almost 20 cm, providing an uninterrupted low-profile 20mm Picatinny rail, ideal for advanced mounting of optics, AN/PEQs, or other aiming systems.

This upper handguard is designed to create a monolithic system and installs "bridged", attaching to both the front gas block/sight and the lower handguard. It is specifically compatible with extended lower handguard assemblies, such as the B-10L + DL-1 combination (sold separately).

Main Advantages

Long "Zen-Style" Design: Replica of the B-31L for a complete "Alpha" look.
Robust Construction: Entirely in CNC Aluminum.
Superior Picatinny Rail: 19.8 cm of low-profile 20mm rail.
Monolithic System: Attaches to the lower handguard for maximum stability.
Specific Compatibility: Designed for extended lower assemblies (e.g., B-10L + DL-1).

Technical Specifications

Manufacturer: 5KU
Model: B-31L Style Upper Handguard (Marked B-31N)
Material: CNC Aluminum
Interface: 20mm Picatinny Rail
Platform Compatibility: AKM / AK74 / AK105 (LCT, GHK, etc. - Excluding AKS-74U)
Lower Compatibility: 5KU extended handguard assemblies (e.g., B-10L + DL-1)
Length: 198 mm (19.8 cm)
Width: 36 mm (3.6 cm)
Height: 46 mm (4.6 cm)
Weight: 120 g (0.12 kg)
Color: Black

Package Contents

1 x B-31L Upper Handguard
Hardware required for installation

Important Note: This is only the upper handguard. A compatible lower handguard assembly (e.g., B-10L + DL-1), sold separately, is required for installation.

Brand 5KU

Reference 11915306000,5KU-283-BK