DEADAIR RXD685S RXD XENO BRDCAGE FLSHHIDER 5/8-24
The Dead Air Armament RXD685S is a 5/8-24 flash hider that merges Ruger's proven bird cage design with Dead Air's modern Xeno mounting technology. If you're running a .308 or other rifle that shares this thread pitch and want effective flash suppression without the weight and tax stamp of a silencer, this muzzle device delivers the flash reduction hunters and shooters have relied on for years—now with the security and repeatability that comes from Dead Air's taper-lock system.
The Xeno mounting system is the real story here. That taper design locks down tight and stays put, meaning point-of-impact consistency shot after shot, even when you're pushing hard on the trigger or moving between sessions. You get the flash-cutting geometry of a classic bird cage—the same lines that made Ruger's originals trusted field tools—paired with a modern mounting interface that shoots as tight as you do.
This is a straight flash suppression play. No frills, no compromise. Whether you're working a rifle at the range, in the field, or from the bench, the RXD685S handles the job without overthinking it. The bird cage design sheds carbon and debris naturally, and the 5/8-24 thread fits a wide range of rifles in common calibers.
Key Features
- Xeno taper-lock mounting system for secure, repeatable lock-up
- Ruger bird cage flash hider geometry for proven flash reduction
- 5/8-24 thread pitch for broad rifle compatibility
- Durable construction designed for hard use
Specifications
| Thread Pitch | 5/8-24 |
| Mounting System | Xeno Taper |
| Brand | Dead Air Armament |
| Model | RXD685S |
Frequently Asked Questions
What rifles does the 5/8-24 thread fit?
The 5/8-24 thread pitch is common on many centerfire rifles, including .308 Winchester and other standard calibers. Check your barrel's thread specification before ordering; incorrect threading will not fit safely.
How does the Xeno mounting system work?
The Xeno taper-lock design ensures a secure mechanical lock-up between the muzzle device and barrel. This taper interface provides repeatability and durability through hard use.
Is this a flash suppressor or a silencer?
This is a flash hider (flash suppressor). It reduces muzzle flash but does not reduce sound pressure levels. It requires no tax stamp or registration.
Can I swap this between barrels?
You can move it between rifles with matching 5/8-24 threads. The Xeno system's repeatability means point-of-impact should remain consistent when remounting.

