Zenitco B-31 V2.0 Upper Picatinny Rail
- $249
Available Options
In short: The Zenitco B-31 V2.0 is a one-piece D16T upper Picatinny rail for documented full-size 415 mm configurations. It requires B-30, B-30U or the B-10L and DL-1 combination, and attaches with eight supplied screws.
Compatibility checkpoint
- Required lower interface: B-30, B-30U, or B-10L with DL-1.
- Documented configuration: full-size 415 mm.
- Excluded: shortened configurations.
- Older lower components: B-30 or B-30U produced before April 2020 may require the manufacturer-documented compatibility modification.
The manufacturer also documents B-31 with a compatible Sport-1 configuration in place of B-31L.
Purpose and construction
B-31 V2.0 forms a 185 ± 5 mm upper Picatinny section while keeping the mechanical sight line clear. The body is milled as one piece from D16T alloy.
Technical specifications
| Material | One-piece milled D16T alloy |
|---|---|
| Picatinny section | 185 ± 5 mm |
| Overall dimensions | (200 × 47 × 37) ± 5 mm |
| Weight | 116 ± 5 g |
| Mounting | 8 supplied screws |
| Operating range | −50°C to +50°C |
| Documented service and storage warranty | 60 months |
| Colors on this card | Black, desert and golden khaki |
What's in the Box
- B-31 V2.0 upper rail — 1
- Mounting screws — 8
- User manual — 1
Installation
- Confirm the exact lower interface and its production version.
- Position B-31 on B-30, B-30U, or the documented B-10L and DL-1 combination.
- Secure all eight supplied screws evenly.
- Verify the complete assembly before attaching accessories.
For a different application, compare B-31S V2.0, B-31LN and B-31U/RPK. Match the required lower interface rather than appearance alone.
Frequently asked questions
Which lower components work with B-31 V2.0?
The manufacturer documents B-30, B-30U, or B-10L together with DL-1.
Does B-31 fit shortened configurations?
No. This version is documented for full-size 415 mm configurations.
What should be checked on an older B-30 or B-30U?
Units produced before April 2020 may require the manufacturer-documented modification because the interface was revised.
What is included?
One B-31 V2.0 upper rail, eight mounting screws and one user manual.
General
Mounting & Rails
Kit Contents
Care & Chemicals
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