Zenitco B-33RPK Picatinny Receiver Cover for B-20U, B-20L and B-23L
- $699
Available Options
In short: Zenitco B-33RPK is a machined D16T receiver cover with an integrated Picatinny rail. It requires a compatible B-23L, B-20L or B-20U lower component and an RPK-based receiver with a removable original cover that is not mounted on an axis.
Compatibility hierarchy
| Required lower component | Documented kit route | Host requirement |
|---|---|---|
| B-23L | Direct; Sport-8; Sport-8U | RPK-based receiver with removable non-hinged original cover |
| B-20L | Direct; Sport-5; Sport-5U | RPK-based receiver with removable non-hinged original cover |
| B-20U | Direct | RPK-based receiver with removable non-hinged original cover |
Selection checkpoint: B-33RPK cannot be installed without one of the documented lower components. A hinged original cover is incompatible.
Documented model configurations
The manufacturer compatibility record lists RPK with an original folding or fixed stock, Saiga 308 Win. isp.61 and Saiga 308 Win. isp.46. The included DO-1 recoil damper is mandatory for both Saiga 308 configurations and optional for the other documented configurations.
Purpose and construction
The integrated Picatinny rail preserves the original mechanical sight line. Its hinged design maintains the mounting position through repeated opening and closing. Four supplied screws connect the cover to the compatible lower component.
Technical specifications
| Host architecture | RPK-based receiver; removable original cover, not mounted on an axis |
|---|---|
| Required lower component | B-23L; B-20L; or B-20U |
| Output interface | Integrated Picatinny rail |
| Material | D16T aluminum alloy, machined construction |
| Attachment | Four supplied screws |
| Operating temperature | −50 to +50 °C |
| Finish options | Black; Desert; Golden khaki |
| Manufacturer warranty period | 60 months for storage and operation |
Installation checkpoints
- Confirm the RPK-based receiver, removable non-hinged original cover and compatible B-23L, B-20L or B-20U.
- Connect B-33RPK to the lower component with the four supplied screws.
- Transfer the spring to the included rear stop and guide assembly.
- For Saiga 308, install the included DO-1 recoil damper; this step is mandatory.
- Complete installation and function checks according to the illustrated operating manual.
What's in the Box
| Zenitco B-33RPK in the selected finish | × 1 |
| Return-spring rear stop and guide assembly | × 1 |
| DO-1 recoil damper | × 1 |
| Mounting screws | × 4 |
| Operating manual | × 1 |
Frequently asked questions
Can B-33RPK be installed without a Zenitco lower component?
No. It requires B-23L, B-20L or B-20U.
Does it fit a hinged original cover?
No. The manufacturer requires a removable original cover that is not mounted on an axis.
When is the DO-1 damper mandatory?
It is mandatory for Saiga 308 configurations and optional for the other documented configurations.
Which kit routes include a compatible lower component?
Sport-8 and Sport-8U use B-23L; Sport-5 and Sport-5U use B-20L.
Zenitco Specs
General
Mounting & Rails
Kit Contents
Care & Chemicals
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