Brackets and mounts
Picatinny M-LOK Accessory Rail
- Bounding box
- 145.0 × 21.2 × 12.0 mm
- Engine
- Precision B-rep
- Parameters
- 17
- Published
- September 15, 2026
Download
Free to download and use. See the terms.
The prompt
Create a straight 14-slot MIL-STD-1913 Picatinny accessory rail designed to mount onto an M-LOK surface. Units: millimetres. Create one single solid component. PICATINNY RAIL: - 14 Picatinny recoil slots. - Rail slot pitch: 10.01 mm. - Each recoil slot width along the rail: 5.23 mm. - Picatinny top rail maximum width: 21.2 mm. - Use symmetrical 45-degree side faces on both sides of the rail profile. - Maintain a constant Picatinny cross-section along the full length except for the 14 transverse recoil slots. - Make the rail approximately 145 mm long. - Centre all features on the longitudinal axis. BASE: - Create a flat mounting base directly underneath the Picatinny rail. - Base width: 21 mm. - Base thickness: 3 mm. - Base and Picatinny rail must form one continuous solid. - Overall rail height including base: approximately 12 mm. - Add 1 mm radius fillets where the Picatinny profile joins the base. M-LOK MOUNTING HOLES: - Add 3 mounting holes through the base. - Hole diameter: 4.5 mm. - Position all three holes on the longitudinal centreline. - Position one hole near each end and one at the centre. - Use approximately 60 mm spacing between adjacent mounting holes. - Add circular counterbores from the top. - Counterbore diameter: 8 mm. - Counterbore depth: 2.5 mm. - Do not model screws, nuts or M-LOK T-nuts. FINISHING: - Add 0.5 mm chamfers to the two ends of the rail. - Keep all Picatinny engagement surfaces and recoil slot edges geometrically sharp. - Do not add decorative features. - Do not model the M-LOK handguard. - Output only the single rail component.
Parameters
| Name | Value | Range |
|---|---|---|
| Overall Length | 145 mm | 100 – 200 |
| Slot Count | 14 | 4 – 30 |
| Slot Pitch | 10.01 mm | 8 – 15 |
| Recoil Slot Width | 5.23 mm | 3 – 8 |
| Top Rail Maximum Width | 21.2 mm | 20 – 22 |
| Base Width | 21 mm | 20 – 22 |
| Base Thickness | 3 mm | 2 – 5 |
| Overall Height Including Base | 12 mm | 10 – 15 |
| 45-Degree Side Face Depth | 2.5 mm | 1 – 5 |
| Recoil Slot Depth | 2.5 mm | 1.5 – 4 |
| M-LOK Hole Count | 3 | 3 – 3 |
| M-LOK Hole Spacing | 60 mm | 40 – 80 |
| Mounting Hole Diameter | 4.5 mm | 3.5 – 6 |
| Counterbore Diameter | 8 mm | 6 – 10 |
| Counterbore Depth | 2.5 mm | 1.5 – 4 |
| Base Joint Fillet Radius | 1 mm | 0.2 – 2 |
| End Chamfer Size | 0.5 mm | 0.2 – 1 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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