Atlas Custom Works Aluminum Keymod & M-LOK Sling Adapter, Black

You've got a sling. You've got a rail. The problem is which rail, and most handguards don't agree with each other.

The Atlas Custom Works sling adapter bridges Keymod and M-LOK rails so you can mount a standard sling attachment point on either system. CNC-machined aluminum, black anodized, built to handle the load without adding bulk.

Why it matters. Keymod and M-LOK are the two dominant direct-attach rail standards, but they don't share mounting hardware. A handguard with Keymod slots won't accept an M-LOK sling mount, and vice versa. This adapter sits in either rail type and gives you the attachment point you need, so you're not choosing a sling based on your handguard or vice versa.

What it's for. Single-point and two-point sling mounts. Loop-style sling swivels. Any mounting hardware that expects a flat, secure foot on the rail. It's not a sling itself — it's the interface between your rail and whatever sling setup you're running.

Before you buy. Check your handguard. Keymod slots are cut into the rail body at 3, 6, and 9 o'clock. M-LOK slots are wider, lower-profile cutouts along the underside and sides. This adapter accepts both, so it doesn't matter which you have — but make sure the mounting position on your handguard actually has a slot where you want the sling to attach.