Dolos Metric Lock Collar
This SKU has been discontinued, but may still be available from retailers.
The Dolos Lock collar provides the ability to add additional barrels to your Dolos equipped AR15. This unit is compatible with handguards using a 47x1mm barrel nut thread pitch.
Note: This lock collar is not the standard thread pitch typically included with a Dolos/Prometheus. Imported rails found on eBay, at gun shows, and from other sales organizations who import or buy rails from importers, will likely fit this lock collar. We do not have a list of compatible handguards for this thread pitch.