ARC Nucleus/Barloc

[just browsing]

All -

I had a great discussion with Ted today about his new Barloc system and just wanted to extend some of the info that he was able to give me. He's obviously super busy at this point and has been receiving an overwhelming amount of questions regarding both the Nucleus and Barloc.

Disclosure: I am in no way associated with Ted or ARC in any way, nor am I anything resembling an expert regarding this product. He simply asked me to try and clear up some of the questions regarding it. This is nothing more than a "this is what I learned, take it fwiw."

I am not going to get into the technical details or what options are available as they can all be found on ARC's website.

1. The Barloc is NOT designed to be a switch barrel system like those found on AIs, DTs, WTOs, or similar. It was designed to allow barrel changes with a hex key rather than a barrel vice and an action wrench, nothing more.​

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2. There has been no discernible difference in accuracy when using a Barloc.​

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3. Both shouldered and non-shouldered versions require headspace gauges when installing a barrel. I specifically asked him about shouldered setups and he said that headspace can still change depending on the amount of force placed on the conical washers and the resulting tension placed on the locking collar.​

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4. Based on #2, we can infer that there will most likely be a POI shift each time you remove a barrel. He did not venture to guess how much or little it would shift, he just said to expect that you will need to re-zero every time you take a barrel off (even when using headspace gauges and a torque wrench).​

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5. You should be able to switch barrels without removing the action from your stock or chassis. He redesigned the collar to give the locking bolt more clearance over the sides of most stocks. This is dependent on your fore end obviously, so for those of you with front handguards, you may be SOL.​

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6. Shouldered barrels will require the shoulder to be set further forward in order to work in conjunction with the Barloc. He said that he will release drawings soon with specific distances from the bolt face since it will require some modification by your gunsmith. Savage prefit barrels will work as normal with no additional modification required.​

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7. Contrary to the video that was floating around for a while, there is no 'flat' that needs to be machined into the threads of your barrel for use of the Barloc. He should be posting another video soon with the revised version.​

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8. The Nucleus rail has been redesigned to index both the recoil lug and split collar so that it is always 'timed' in the same position relative to the receiver. This reduces the amount of variables in the system and hopefully increases consistency each time a barrel is re-installed.​

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9. Regarding delivery dates, he did say that he's hoping to send them in for nitriding within the next couple of days and begin shipping within the next couple of weeks. He also said that the Nucleus was his first and foremost concern at this point, and that anything surrounding the Barloc will be secondary to action production and delivery.​

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Again, I would just like to re-iterate that I am just passing along info that was passed along to me. I am hoping this will help to clear up some of the confusion surrounding the Barloc as there seems to be a lot of it. I will do my best to answer any other questions there might be but can't guarantee any answers.

Good shooting!

 

[bohem]

OD max on the barloc with a barrel nut is the same as the receiver. 1.35

 

[just browsing]

^What Josh said. Dimensionally there shouldn't be any protrusion outside of the diameter of your receiver so I don't believe there will be any issues with fitment on open fore ends. Only thing I am not 100% on is those chassis systems with handguards, like the XLR Evo or Cadex Lite Comp. I'm not sure you'll be able to use the Barloc with how those handguards are fastened to the receiver.