Description
Running an M-LOK handguard is great until you find that one accessory you love still comes with a Picatinny clamp. That's exactly the gap this GrovTec 3.8" 9-Slot M-LOK Picatinny Rail is built to fill. It gives you nine MIL-STD 1913 slots of true Picatinny real estate on any M-LOK compatible forend, so you can keep the slim, snag-free profile of M-LOK where you want it and add rail space right where you need it.
How the GrovTec 9-Slot M-LOK Rail Earns Its Keep
The section is precision CNC machined from solid aluminum and wears a Type III black hardcoat anodized finish, which is the same class of coating you'll find on quality handguards and receivers. That means it shrugs off the usual scuffs, sweat, and weather without turning your setup into a pile of extra ounces. At 3.8 inches with nine slots, it hits a useful middle ground: long enough to run a light, laser, or a bipod adapter, short enough that it won't eat up your whole handguard.
Getting the GrovTec 3.8" Rail Mounted
Installation is about as simple as it gets. The rail comes with the mounting hardware and an Allen key in the box, so you're not hunting through your parts bin the day it shows up. It clamps down onto your M-LOK slots, seats flat, and stays put. Because the standard on top is genuine MIL-STD 1913, anything cut for a Picatinny rail will drop right on, whether that's a weapon light, a red dot offset mount, a pressure switch panel, or a QD sling base.
What You Can Hang On It
Think of this as a blank canvas for the front half of your rifle or shotgun. Weapon lights are the most common use, followed by lasers and IR illuminators for the night crowd. It's also a clean way to add a bipod stud adapter or a hand stop without committing your entire rail to one system. If you've been holding off on an accessory because it wasn't M-LOK native, this little section solves the problem for good.
Key Specifications
- Manufacturer: GrovTec
- Model: 3.8" 9 Slot M-LOK
- Manufacturer Part Number: GTSW238
- UPC: 811071012386
- Length: 3.8 inches
- Number of Slots: 9
- Rail Standard: MIL-STD 1913 Picatinny
- Mounting System: M-LOK
- Material: CNC machined aluminum
- Finish: Type III Black Hardcoat Anodized
- Color: Black
- Product Type: Picatinny Rail Section
What’s Included
- GrovTec 3.8" 9-slot M-LOK Picatinny rail section
- Mounting hardware
- Allen key for installation
Frequently Asked Questions
Will accessories designed for Picatinny rails fit this GrovTec M-LOK rail section?
Yes. The top of the rail is cut to the MIL-STD 1913 Picatinny pattern, so anything built for a standard Picatinny rail will clamp right on. That covers weapon lights, lasers, offset mounts, QD sling bases, and similar gear.
Does the GrovTec 3.8" rail come with the hardware to install it?
It does. GrovTec includes the mounting hardware and an Allen key in the box, so you can bolt it onto your M-LOK slots without a trip to the hardware store. Just line it up over the slots, snug the screws down, and you're set.
What can I mount on a 9-slot section this size?
Nearly four inches with nine slots gives you plenty of room for a weapon light, a laser or IR unit, a bipod stud adapter, or a hand stop. It's a good length for most single accessories without taking over your whole handguard.
Is this rail durable enough for hard use?
It's CNC machined from solid aluminum and finished with a Type III black hardcoat anodize, the same tough coating class used on quality handguards and receivers. That finish holds up well against wear, moisture, and the elements while keeping the section light.





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