Quick Summary
The RALSPEC Aluminium 3 Slot 20 mm x 40 mm Picatinny rail section is an MLOK compatible rail attachment for adding 1913 Picatinny spec accessories. It is described as a 3-slot aluminium rail section finished in matte black, with hardware included for fitting to MLOK slots.
The rail section is presented as suitable for aluminium or polymer hand guards and forends, and the stated weight is 13 g for the rail only. The profile is square with rounded edges, and the mounting note advises not to overtighten the screws.
Key Details
| Detail | Verified information and buyer relevance |
|---|---|
| Brand | RALSPEC. Useful for identifying the exact rail section. |
| Product type | Aluminium rail section, 3 slot, MLOK compatible. This is the core fitment detail. |
| Size | 20 mm x 40 mm. Check this against the space available on the hand guard. |
| Slots | 3 slots. This affects how much accessory mounting space the section provides. |
| Material | Aluminium. Relevant for the feel and configuration of the part. |
| Finish | Matte black. Useful if appearance matters alongside fit. |
| Weight | 13 g for the rail only. Helpful when keeping added weight low. |
| Included hardware | Mounting hardware is included. Check the selected offer contents if this matters. |
What to Compare Before Buying
- Compatibility: This section is for MLOK compatible hand guards and forends. Check the exact mounting system on your item before choosing it.
- Size: The stated size is 20 mm x 40 mm. Compare that with the space you want to use.
- Accessory type: It supports 1913 Picatinny spec rail-mounted accessories. Make sure the accessory you plan to fit matches that format.
- Included fixing hardware: Mounting hardware is included, which matters if you want a complete fitting set.
- Mounting method: The rail fits directly to MLOK slots, so the hand guard or forend must match that layout.
Compatibility, Size and Fit
This rail section is described as compatible with MLOK hand guards and forends, including aluminium and polymer versions. It is also described as supporting 1913 Picatinny spec accessories. The 20 mm x 40 mm size and 3-slot format make the available fitting space an important check before purchase.
If you are matching it to existing accessories, confirm that both the mounting system and accessory standard are the right fit for your setup.
What Else You May Need
The rail section includes the hardware needed for attachment, so the main requirement is an MLOK compatible hand guard or forend. If you are fitting accessories, make sure those accessories are Picatinny spec where that matters.
Setup and Correct Use
The rail is fitted directly to MLOK slots. When tightening the screws, do not overtighten them. The stated maximum torque is 4 Nm or 35 in/lb, and the short handle of the Allen key is suggested for tightening.
Use the supplied hardware and check that the rail sits correctly before loading it with accessories.
Before You Decide
Confirm that your hand guard or forend is MLOK compatible, and check that the 20 mm x 40 mm size suits the space you have available. If you plan to mount accessories, make sure they are 1913 Picatinny spec where required. The rail section includes fitting hardware, so check the selected offer contents if that is important to your purchase.
Follow the stated torque limit and the manufacturer instructions during fitting.
