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5/19/2007 5:57:44 AM EDT
I traded into a Stag Arms 6.8 SPC.  The previous owner put on a Yakee Hill free float quad rail and a brownells gas block with a rail. I went to go put a front flip up sight on the gasblock only to discover that it is mounted off center. The sight is on a angle. This gas block is held in place by three allen head set screws. One of the set screws was stripped really badly. I couldnt get it out with the set of Craftsman stipped screw removers I have. I had to drill out the screw and dimpled the barrel. The barrel is thickest aroun the Gas block and tapers down on both sides of where the gas block mounts. The dimple is a little more than half as deep as the pin cuts for the original pinned in gas block.The barrel is just as thick in place that it is dimpled(the larger area that the gas block mounts to). Is this OK? Or is the barrel a goner. If the barrel is ok what will this effect. Thank you for your help.
5/19/2007 10:01:54 AM EDT
[#1]
your OK as long as you didn't go through into the bore.  affect?: prob nothing.

advntrjnky
5/20/2007 4:20:15 AM EDT
[#2]
no problem
5/20/2007 8:56:15 AM EDT
[#3]
It is standard practice to dimple the barrel for one of the setscrews.
When you install the gas block, one of the setscrews gets tightened into the dimple.
That creates a mechanical lock that is much stronger than simple setscrews pushing against the barrel.


5/20/2007 9:49:31 AM EDT
[#4]
Thank you for anwswering my newbie question.
5/20/2007 3:30:18 PM EDT
[#5]
I decided to stop just eyeballing the depth of the hole that I so stupidly drilled and mesure it. Its 1/16 of an inch, well a hair less and I mean a hair. I want to insert the set screw back in that hole to more secure the gas block but i removed the threads in that hole. I do have another gas block of the same make so Im going to make the switch later this week.

Again, I appreciate all your help.
5/20/2007 6:09:16 PM EDT
[#6]
I tried to respond to your PM, but you are not accepting PM's at this time so i will answer here instead...


I want to thank you for the post on my dimpled barrel and ask you could do a stainless Steel barrel bolt and carrier for my 6.8SPC. I use the gun as a ranch gun and do lots of hog hunting in The Houston Areas Humid salty Air.

BTW How deep is the whole you drilled in the pic for the set screw?


I am not accepting orders for custom barrels made from scratch right now due to my excessive backlog.

I do have some 18" stainless 6.8 SPC barrels in stock that I can work with though.
These are medium weight mid-length barrels.
No problem to shorten to 16" of that's what you wanted.
They don't have front sight bases on them so they are best used with a freefloat handguard and optic sights.
I do have a couple different flip-up front sights that could also be installed on the barrel.

Looking at $400 for a barrel with a complete 6.8 SPC bolt carrier group.

I typically drill detents about 0.030" to 0.040" deep, but a full 1/16" would not be anything to worry about.

Randall
5/20/2007 7:32:44 PM EDT
[#7]
Just out of curiosity, how deep are the cuts in the barrel for the pins that hold the gas block on?
5/20/2007 8:16:25 PM EDT
[#8]

Quoted:
Just out of curiosity, how deep are the cuts in the barrel for the pins that hold the gas block on?


Anywhere from 1/16" to about 3/16"
The shallower the better.
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