The Sig Sauer SLH (brand part no. SLH300-QD) is a .300 Blackout rifle suppressor built around the Clutch-LOK QD mounting system, with an internal multi-flow path focused on sound reduction and cutting up to 50% of toxic fumes venting through the ejection port. Sig Sauer designs the SLH for shooters running both supersonic and subsonic ammunition. The SLH favors .300 Blackout shooters who want optimized sound suppression across both loads.

Key Specifications

• Chambered for .300 Blackout, both supersonic and subsonic loads.
• Mounts with the Clutch-LOK QD system.
• Reduces toxic fumes through the ejection port by up to 50%.

Frequently Asked Questions

Is this an NFA item? Yes. As a suppressor, it’s a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

Does it work with subsonic ammunition? Yes, it is optimized for both supersonic and subsonic .300 Blackout loads.

Buy the Sig Sauer SLH Suppressor

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax, and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through Sig Sauer‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will walk you through the transfer process.