The Stealth LoK™ QD System is a patent pending Quick detach system that is used with Engaged Industries QD Suppressors.
The Stealth LoK™ QD System was designed to be an upgrade attachment system for any suppressor brand using 1.375-24 threads, sometimes referred to as “HUB” thread.
The Stealth Lok™ QD system allows the suppressors to be rapidly installed on multiple firearms. 6 locking lugs and the ability for the suppressor to be installed in any orientation, makes it quick and easy to attach in any scenario including total darkness. without any ratcheting mechanisms, it is very stealthy when connecting and disconnecting, giving the attachment device it’s name. There is no secondary mechanism to operate to attach the suppressor. It’s secondary lock is built into the system. This makes it an ideal one handed attachment system for platforms that have the handguard extending beyond to barrel.
TECH SPECS: FULL Specifications Here
Thread: 1.375″-24 “HUB thread”
Weight: 1.6 oz
With muzzle device 2.9 – 4.5 oz (Dependent on muzzle device choice)
Length: Added length to suppressor 0.29”
Finish: Black Nitrided Alloy Steel Rc 52+
Total length including internal threads: 0.64”
Muzzle device protrusion inside suppressor 0.0 – 1.5” (Dependent on Muzzle device)
Compatibility: Compatible with any suppressor using 1.375″ – 24 threads. Verify threads of your suppressors on the manufacturers website or contact their customer support.
REVIEWS:
https://www.alloutdoor.com/2025/07/03/alloutdoor-review-engaged-industries-operator/
$229.00
