Zenitco B-25U 45-Degree Picatinny Adapter for RK-0, RK-1, RK-2 and RK-4
- $59
Available Options
In short: Zenitco B-25U is a D16T aluminum adapter that positions one compatible Classic RK grip at 45 degrees on a Picatinny rail. It accepts RK-0, RK-1, RK-2 and RK-4 after their standard outer mount is removed.
Compatibility hierarchy
| Accessory | Required input | Result |
|---|---|---|
| RK-0 | Remove its standard outer mount; B-25U on Picatinny | One grip at 45° |
| RK-1 | Remove its standard outer mount; B-25U on Picatinny | One grip at 45° |
| RK-2 | Remove its standard outer mount; B-25U on Picatinny | One grip at 45° |
| RK-4 | Remove its standard outer mount; B-25U on Picatinny | One grip at 45° |
| PKM / PKP documented route | B-50 Picatinny + B-25U + RK-2 | RK-2 positioned at 45° |
Selection checkpoint: B-25U carries one compatible RK grip. The B-25P is the separate configuration for two grips. B-25U requires a Picatinny input and does not accept Basis-interface L-series grips.
Construction and interface
The machined D16T aluminum body clamps to Picatinny with a pressure bar and two screws. The grip's T-shaped lug slides into the corresponding B-25U slot and is retained by the grip screw.
Technical specifications
| Compatible grips | RK-0; RK-1; RK-2; RK-4 |
|---|---|
| Input interface | Picatinny |
| Output | One compatible RK grip at 45° |
| Material | D16T aluminum alloy, machined |
| Dimensions | 47 × 36 × 15 mm, tolerance ±2 mm |
| Weight | 45 ± 2 g |
| Operating temperature | −50 to +50 °C |
| Finish options | Black; Desert |
| Manufacturer warranty period | 60 months for storage and operation |
Installation outline
- Remove the standard outer mount from the compatible RK grip.
- Slide the grip's T-shaped lug into the B-25U slot and secure it with the grip screw.
- Loosen the two B-25U installation screws, seat the adapter fully on Picatinny and tighten both screws evenly.
- Confirm that both the adapter and grip are secure.
What's in the Box
| Zenitco B-25U base in the selected finish | × 1 |
| Operating manual | × 1 |
Frequently asked questions
Which grips fit B-25U?
The manufacturer documents RK-0, RK-1, RK-2 and RK-4.
Does B-25U accept Basis L-series grips?
No. It is documented for the listed Classic RK grips with their removable standard outer mount.
Which interface does B-25U require?
It clamps to a Picatinny rail with its pressure bar and two screws.
Does it hold one or two grips?
B-25U holds one compatible grip at 45 degrees. B-25P is the separate two-grip configuration.
Zenitco Specs
General
Mounting & Rails
Kit Contents
Care & Chemicals
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