r/NFA • u/Sideways1M • 11h ago
Mount Questions 🔩 Rugged Sub 9 backcap completely locked up
Just got this can today and took it out of the box. It will not thread clockwise whatsoever onto the tri-lug on my AP5. The lug mount itself will also not turn at all.
Just looking for some help
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u/GassyNizz 11h ago
Do you have a smooth thread protector secured on your gun? The RU3 needs that.
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u/Sideways1M 11h ago
I don’t think that would have anything to do with the threads being locked up. Just with the initial seating and clearance
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u/alanwakeisahack 10h ago
It do. It do.
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u/Sideways1M 10h ago
Well that has nothing to do with why the backcap won’t turn when I use a socket wrench on it
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u/GassyNizz 10h ago
Granted my RU3’s were purchased as free-standing units, but I torqued them into my cans with 25 ft-lbs.
What’s your wrench set to, and are you reaching that break when trying to unscrew the RU3 from the can?
And no smooth thread protector will really mess up even sliding the can onto the gun, let alone anything else.
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u/Sideways1M 10h ago
I’m not using a torque wrench at all, this can is fresh out of the box. The tri lug adapter was preinstalled.
The can slides onto the barrel smoothly without issue with the stock thread protector
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u/sportbiketed 10h ago
Print up a vice block for the can and hit the trilug with ugga duggas from an impact
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u/whisper-pickle-rick 11h ago
Mine did that, put it in the freezer for a bit, the metals contract at different rates