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Posted: 9/6/2016 7:06:39 AM EDT
| They clamp to a special barrel but, do I need to apply any glue or locktite to the nut it clamps to? |
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Nobody recommends threadlocker on a barrel nut. Some makers use it and it's to discourage owners from changing thing, which they report it certainly does, along with actual damage to the firearm when they attempt it. There is NO milspec defining it's use anywhere on the gun. The barrel nut is secured by the gas tube running thru it as a mechanical lock. In actual practice nobody should be exerting 30-85 pounds of force on the nut anyway - it would constitute abuse. It would be attempting to twist the free float and I can't think of any reason to do that.
The smaller bolts might need thread locker and the general consensus is that if red is supplied then substitute with blue or accept the consequences. The use of red on a firearm generally creates the need to employ a gunsmith to take things apart to minimize the damage - there's no guarantee he won't - and it also goes back to milspec. Threadlockers aren't ever used milspec. If a maker is using globs of glue to hold in screws then it is certainly questionable if you even need to consider the application or that part. Use of a high heat resistance "red" type of threadlocker means you should consider the installation permanent with no ability to change it in the future. At that point It should be asked why not use expanding rivets or some other fastener - like peening pins over or staking, which IS milspec and the preferred method. |
| Hand guards that compress around a special barrel nut and has 3 screws to tighten below the nut. Looks like Midwest industries gen. 2. They were a gift so I am thinking they are a Chinese copy of Midwest. The screws do not go through the barrel nut but but are below it, is why I am afraid the handguard will move forward. It does look and feel like a well made product, but their are no marking's on it. Not sure if I should use it on a budget 300 blackout build. |
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Quoted:
They clamp to a special barrel but, do I need to apply any glue or locktite to the nut it clamps to? For some designs like BCM's KMR and SLR's Solo models, the clamp mechanically interlocks with the proprietary nut. These days, I prefer these brands because (like Midwest Industries gen 3) they don't require any indexing for the gas tube, so you can torque the nut as you like and be done with it. - CW |
| Recoil pushes forward. That's why you mount pic rail accessories pressed against the front of the notch. I have an MI G2 hand guard that came with a tube of thread locker in the package specifically for coating the outside of the barrel but before clamping the tube. My hand guard is for .308 though, not sure about the AR-15 version. |
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Quoted:
Now that you mention friction I think i understand. The recoil would be pushing backwards keeping the handguard from moving forward. Right? |
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