Ar-15 Dolos Takedown Lock Collar.

Mix and Match AR Barrel Assemblies

The Pantheon Arms Dolos Takedown Lock Collar adds a new level of versatility for owners of AR-15 rifles equipped with the company's innovative Dolos Takedown kit. Users can equip the lock collar in order to attach different-style barrel assemblies to their upper receiver without having to change out the entire upper.

  • Only works with YHM-style barrel nuts
  • Features 1.85-inch 30-TPI threads
  • Does not include Dolos Tri-Lug assembly

Owners of the Pantheon Arms Dolos Takedown Lock Collar can also use the system to enhance their gun with different-length handguards, allowing for easy customization.

DOLOS Takedown Lock Collar
5.0 5.0 based on 1 reviews
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Unknown Infidel

Holland, MI

  • Pros Aesthetically Pleasing, Easy To Install, Good Value, Safe, Tough
  • Describe Yourself Occasional Shooter
  • Was this a gift? No
  • Bottom Line Yes, I would recommend this to a friend


Installed easy with no damage to gun. everything is good and tight and working as advertised. It took a little bit to figure out that it may need to be slightly adjusted when the handguard is on the gun by pulling down on the lock and rotating the handguard just a little bit. There are ratchets to enable you to do this built into the barrel lock. Price here was decent and shipping was fairly good. I want more of these for other guns I own. Makes them far easier to transport to the range when I can stuff them in a smaller bag.

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