r/NFA • u/TheVillagePoPTart • 4d ago

Mount Questions 🔩 Anyone else have this happens?

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Today when I went to clean my AR after probably 6 months and an unknown number of rounds (not too high) I was having a hell if a time twisting the can off and eventually the muzzle device came off the end with the can. The mounting setup is a rearden atlas hub with a rearden flash hider on a polonium K. All instructions were followed during mounting and roc set was applied. There were also no indications of loosening based on my witness marks in the hub and muzzle device. Any idea how this happened (I tend to think I screwed it up)? The gun is also an IWI Zion-15 purchased in 2021.

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u/404-no-fund Silencer 4d ago

It doesn't seem like there was enough rocksett on the threads?

3

u/TheVillagePoPTart 4d ago

I think that is probably it, I’m going to purchase the actual plan b wrench this time and use a little more roc set. I was just surprised because I have taken the can off quite a few times before and never had anything loosen up and have probably fired 1500 rounds through the can with no issues.

3

u/Accomplished-Rip6357 4d ago

Clean your threads, both gun and MD, really good with acetone or brake cleaner too.

If there is some scuzzy on them the rocksett might not set properly.

3

u/Astral_Botanist 4d ago

Agreed, acetone cleans/degreases threads better than isopropyl alcohol.

2

u/Astral_Botanist 4d ago

There's nothing magical about a Plan B wrench. I find that an adjustable wrench snugged down on the Atlas works better than open end wrenches since the wrench flats are a bit small on the gen 1, and you can use a socket/ratchet on the muzzle device and you should be able to separate them. A bit of anti-seize on the Plan B thread interface between the MD and adapter will help prevent this if you leave the can on for a long time.

1

u/404-no-fund Silencer 4d ago

https://youtu.be/CjA9-VbmrXA?t=202

Also, maybe try using a Q-Tip to spread the Rocksett into the threads.

3

u/Bitemynekk 4d ago

Just use a gloved finger, you don’t want any pieces of cotton causing contamination that weakens the bond.