Gemtech Tri-Lock .338 Lapua Magnum Muzzle Brake - M18x1.5 RH Thread

The Gemtech Tri-Lock .338 Lapua Magnum muzzle brake is a quick-detach adapter designed for shooters running Gemtech's ARROW suppressor on their .338 LM rifles. Built around an M18x1.5 right-hand thread, this brake enables fast mounting and removal without tools, so you can switch between suppressed and unsuppressed shooting in seconds. For long-range hunters and precision rifle competitors pushing heavy magnum rounds downrange, that convenience adds up—especially when you're testing different configurations at the range or hunting in variable conditions where you might toggle suppressors between rigs.

Gemtech's Tri-Lock system is engineered for reliability under the pressures that come with .338 Lapua Magnum cartridges. The quick-disconnect design maintains zero repeatability, meaning your point of impact stays consistent when you attach and detach the suppressor. That matters when you've dialed your scope for a specific setup and need confidence that your shots will land where you expect them.

If you're already invested in a Gemtech ARROW suppressor or considering the platform for your .338 LM build, this adapter is the piece that makes the system work. Check thread pitch and diameter on your barrel before ordering to confirm compatibility—this one is built for M18x1.5 RH spec.

Specifications

Frequently Asked Questions

Is this adapter compatible with my Gemtech ARROW suppressor?

Yes. The Tri-Lock adapter is designed to work with Gemtech's ARROW suppressor platform. It enables quick mounting and detachment of the suppressor to your .338 Lapua Magnum rifle.

What thread pitch does this brake use?

This adapter is threaded M18x1.5 RH (right-hand). Verify your barrel is cut to this exact specification before purchasing, as incorrect threads won't fit safely.

Will this affect my rifle's point of impact?

The Tri-Lock system is designed to maintain zero repeatability, so attaching and detaching the suppressor should not shift your point of impact.

Can I use this without a suppressor?

This product is a quick-detach adapter for use with the Gemtech ARROW suppressor. If you need a standalone muzzle brake for .338 Lapua Magnum, you'll want a different product.