Low Profile Gas Block Install tips.

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[ARCHIVED THREAD] - Low Profile Gas Block Install tips.

Posted: 2/4/2006 3:10:54 PM EDT

I have installed a few FSB gas blocks but this is my first low profile install, it's a PRI low profile gas block.
I installed the gas tub and pin, lubed the inside of the gas block and the barrel and slowly slid
it in place on the barrel. made sure gas hole was properly aligned and gas tub was in place.
gas block fit was just snug, slight twisting as I pushed and it got there.
now I just have the set screws snugged in place nothing more. question is should I just tighten
the set screws untel it's firm as is.. or should I clean the gas block the brake cleaner or other and put any locktight on the set screws? if locktight what kind?
I do have blue 242 and red high strength. all suggestions are welcome.
if this has been discussed please post linky.
thanks

Posted: 2/4/2006 3:48:55 PM EDT

[#1]

Ouse loctite for sure. The highest strength you can get. Dont be shy, use a generous amount. I've seen one come loose, and have heard of several others. With a generous amount of high strength loctite, you should be ok though.

Posted: 2/6/2006 7:48:36 AM EDT

[#2]

thanks new-arguy, cleaned it good yesterday and let it dry good overnight. will put red super strength on this evening.

Posted: 2/6/2006 10:17:30 PM EDT

[#3]

Set at least one setscrew into a detent.
Here is the process.
Get the block where it belongs.
Tighten the setscrews hard enough that you make a little ring with the cup point of the setscrew.
Now take the block back off.
Center punch one of the circles.
Now, using an 5/32" drill bit, drill down into the center punch mark just deep enough to make a 5/32" detent in the barrel.
No need to push the drill deep enough to make an actual hole with straight sides, you just want to use the pointed part to make a shallow detent.
When you put the gas block back into place, the setscrew will now be below the surface of the barrel and there's no way it will ever move if you also use red loctite.

Posted: 2/7/2006 1:17:32 PM EDT

[#4]

my barrel had a small detent the alignment hole for gas tube and it was right were one of
the set screws needed to be so I used it and put a good amount og high strength red loctite
and tightened the screws a good amount.
thanks

[ARCHIVED THREAD] - Low Profile Gas Block Install tips.

AR-15 » Rifles, Uppers, Lowers, Barrels, and more

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