To dimple or not to dimple

TRaTSeRiF

TRaTSeRiF

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I put in a low profile gas block to run a free float tube on my CORE15 and it comes with 2 set screws. I did a range test and the rifle cycles fine, so before I torque down the tube itself right, would it be a good idea to dimple the barrel or just clean out threads, put some loctite on the screws and leave it as is? I may swap out gas blocks from time to time as I travel between 2 jurisdictions, so there might be some utility value when it comes to dimpling. Any thoughts would be welcome.
 
With a free float tube I don't think it's such a big deal, but more of a piece of mind type thing.

I did dimple the barrel under the low pro gas block on my AR, it doesn't take much to do and at least I know nothing will ever knock it off. It does keep help it indexed over the gas port when torquing down though.
 
i would dimple the barrel "with a drill press" or file a small flat spot on the barrel were the screw touches.
 
arcticcathonda said:
Interesting. I have a VLTOR style low profile gas block (set screw model) and I was thinking of going the extra step of pinning it with my pinning jig in conjunction of dimpling.
Click to expand...

If you want a bomb proof method of attaching your gas block this is a good way to go; BUT if you've properly dimpled the barrel, torqued the set screws properly and even staked them as mentioned above, I don't think pinning it would add much for extra security.

The nice thing about the set screw style is it tends to suck the gas port side of the gas block tighter to the barrels gas port!


IMHO using a roll pin or spring pin rather than a taper pin is a better method as you can remove it for any maintenance in the future if you need (of course you can remove a taper pin, just more of a PITA)
 
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