Zenitco Joker-4 Kit (Type A) - AR-15 Handguard & Adjustable Gas Block Upgrade
- $1 199
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Zenitco Joker-4 Kit (Type A)
Genuine Zenitco | Complete AR-15 handguard and adjustable gas-block upgrade kit | 330 g mount | Black, Desert
In short: the Zenitco Joker-4 (Type A) is a complete forend upgrade kit for AR-15 platforms. It replaces the factory handguard with a two-part B-74 upper / B-84 lower mount and adds an adjustable RGB-2 titanium gas block, giving a top Picatinny rail plus Bazis side rails for B-2 / B-2U bracket expansion.
Overview
The Joker-4 installs in place of the standard AR-15 handguard and turns the forend into a full accessory platform. The milled D16T aluminum body carries a full-length top Picatinny rail and a Bazis guide rail on each side; adding Zenitco B-2 / B-2U brackets forms Picatinny rails on three further sides for optics, lights, aiming modules and grips.
It is built around a titanium BN-1 mounting nut base and an RGB-2 adjustable gas block, so it is a complete drop-in forend solution rather than a rail alone. It ships in a protective tube case with all mounting hardware, rail covers and tools.
What's in the Box
| ✓B-74 upper handguard rail (D16T alloy) | x 1 |
| ✓B-84 lower handguard rail (D16T alloy) | x 1 |
| ✓BN-1 titanium mounting nut base | x 1 |
| ✓RGB-2 adjustable gas block, titanium 0.750" (with locking pin) | x 1 |
| ✓RGB-2 positioning tool | x 1 |
| ✓Joker wrench | x 1 |
| ✓RL-1 hand stop | x 1 |
| ✓A-2L sling swivel | x 1 |
| ✓B-2L rail bracket | x 1 |
| ✓M5x7 mounting screws | x 8 |
| ✓NPN-2 low-profile rail covers | x 6 |
| ✓Tube case | x 1 |
| ✓User Manual | x 1 |
Compatibility: fits AR-15 platform platforms. Installs in place of the standard handguard. Not compatible with the V-AR - please confirm your platform model before ordering.
Key Advantages
- Complete upgrade kit - handguard, gas block, tools and hardware in one tube case
- Two-part B-74 / B-84 mount - milled D16T aluminum, stiff and light
- Four-sided rail expansion - top Picatinny + Bazis side rails for B-2 / B-2U brackets
- RGB-2 adjustable titanium gas block - tune the system for your load
- Titanium BN-1 mounting nut base for a secure, durable mount
Technical Specifications
| Brand | Zenitco |
| Type | AR-15 handguard and gas-block upgrade kit (Type A) |
| Material | D16T aluminum alloy; titanium (gas block and mounting nut base) |
| Rails | Top Picatinny + Bazis guide rail each side (B-2 / B-2U ready) |
| Platform | AR-15 (not V-AR) |
| Mount weight | 330 g (B-74 143 g + B-84 187 g); mounting nut 62 g |
| Dimensions | Upper 368 x 39 x 38 mm; lower 408 x 41 x 51 mm |
| Warranty | Manufacturer warranty (service life): 60 months |
| Color | Black, Desert |
| MPN | Zen-Joker-4 |
| Condition | New |
Frequently Asked Questions
Which platforms does the Joker-4 kit fit?
It is made for AR-15 platform platforms and installs in place of the standard handguard. It is not compatible with the V-AR.
Does the kit include a gas block?
Yes - it ships with the RGB-2 adjustable titanium gas block for 0.750" central assembly, plus a positioning tool for correct fitment.
What rails does it provide?
A full-length top Picatinny rail and a Bazis guide rail on each side. Adding Zenitco B-2 / B-2U brackets forms Picatinny rails on three more sides.
What is Type A?
Type A is the kit variant matched to a specific mounting nut and gas-system layout. If you are not sure which type your upper needs, send us your platform configuration and gas system and we will confirm.
Does the kit include the mounting nut?
The Joker system clamps onto the Zenitco BN-1 titanium mounting nut. Check the kit contents above - if the BN-1 is not listed, order it separately.
Is this a genuine Zenitco part?
Yes - it is an original Zenitco Joker-4 kit with guaranteed US delivery.
Genuine Zenitco Joker-4 - complete AR-15 handguard and gas-block upgrade kit.
Installation
Confirm the required interface before installation: B-74 and B-84 components, BN-1 mounting base and included RGB-2 adjustable gas block for a straight 0.750 in tube seat. Fit the component according to the manufacturer instructions, then verify the resulting interface or function: Joker-4 assembly with upper Picatinny and three-sided Bazis interfaces.
General
Brand
Zenitco
Manufacturer Part Number (MPN)
Zen-Joker-4
Condition
New
Intended Use
AR-15 forend upgrade
Material
D16T aluminum; titanium
Color / Finish
Black, Desert
Weight
330 g (mount)
Dimensions (L x W x H) mm
Upper 368 x 39 x 38 mm; lower 408 x 41 x 51 mm
Mounting & Rails
Mounting method
AR-15 mounting nut
Function
Handguard + adjustable gas block
Care & Chemicals
Compatible platforms / hosts
AR-15 Type A configurations; V-AR is excluded
Required interface / configuration
B-74 and B-84 components, BN-1 mounting base and included RGB-2 adjustable gas block for a straight 0.750 in tube seat
Resulting interface / function
Joker-4 assembly with upper Picatinny and three-sided Bazis interfaces
Exclusions / limitations
V-AR, non-Type-A configurations, non-0.750 in seats and bent-tube layouts
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