Zenitco B-84 Joker-4 Lower Bazis Handguard
- $539
Available Options
In short: The Zenitco B-84 is the lower component of the Joker-4 handguard system for the AR-15 platform. It carries Bazis guides for compatible B-2 and B-2U Picatinny sections and pairs with the matching B-74 upper component.
Compatibility checkpoint
B-84 is documented for the Joker-4 configuration and pairs with the B-74 Joker-4 upper handguard. The complete system also uses the matching mounting nut and a compatible adjustable gas block. B-84 is not a complete standalone Joker-4 system.
Bazis accessory interface
The lower component uses Bazis guides rather than a fixed Picatinny surface. Compatible B-2 and B-2U sections can be positioned on the guides to create Picatinny mounting points only where needed.
Technical specifications
| Documented platform | AR-15 with matching Joker-4 system components |
|---|---|
| Required upper component | B-74 Joker-4 |
| Material | D16T aluminum alloy, one-piece milled construction |
| Accessory interface | Bazis guides for B-2 and B-2U sections |
| Weight | 187 +3 g |
| Dimensions | 408 × 41 × 51 mm |
| Operating range | −50°C to +50°C |
| Manufacturer warranty | 60 months |
| Color | Black |
Delivery basis
B-84 Joker-4 lower handguard — 1.
Installation note
The documented procedure installs the matching mounting nut, positions B-84 with the compatible adjustable gas block, and secures the lower component at the receiver interface. B-74 then seats in the B-84 grooves and is fixed with four screws. Professional installation is recommended when the complete Joker-4 configuration has not already been confirmed.
Frequently asked questions
Which upper component matches B-84?
The matching upper component is the Zenitco B-74 Joker-4.
Does B-84 provide a fixed Picatinny rail?
No. It provides Bazis guides for compatible B-2 and B-2U Picatinny sections.
Is B-84 a complete Joker-4 system?
No. The matching B-74 upper component and the related Joker-4 mounting parts must also be confirmed.
How is B-74 connected to B-84?
B-74 seats in the B-84 grooves and is secured to the lower component with four screws.
What's in the Box
General
Mounting & Rails
Kit Contents
Care & Chemicals
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