Welcome to Halcyon Defense

FRESH OFF THE LATHE: Steyr Aug/MSAR STG-556- 2 sizes available! More innovative products coming soon!

By purchasing Halcyon Defense thread adapters, I acknowledge that: Halcyon Defense produces precision thread adapters that are held to the most stringent quality control standards possible. The end user of Halcyon Defense products is responsible for ensuring that barrels, suppressors, and all other devices that Halcyon Defense thread adapters may be utilized with have threads that are concentric to the bore, and that any projectile that passes through these devices will do so without striking any component in the weapon system. Some manufactures do not adhere to the same standards and precise tolerances as Halcyon Defense, and Halcyon De mage to any component that occurs while using Halcyon Defense thread adapters.