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Posted: 2/19/2020 12:36:24 PM EDT
[#1]
BRD jig and the drill size you referenced work fine. I've done quite a few barrels with that jig. You probably already know this; but buy the jig with center distance that corresponds to the gas block you are using.
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Posted: 2/19/2020 7:25:57 PM EDT
[#2]
Check jig hole centers across the diameter between gas hole locater screw and drill holes. Search for the KAK thread. Can't hurt, quick check
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Posted: 2/19/2020 11:03:17 PM EDT
[#3]
Quote HistoryQuoted:
BRD jig and the drill size you referenced work fine. I've done quite a few barrels with that jig. You probably already know this; but buy the jig with center distance that corresponds to the gas block you are using. How can I tell which one that is? Looks like there is more than one jig with a reference to Geissele in the description. I see one for $90 and another for $55. It’s a little confusing for a novice. You’re saying I need to measure the center-to-center distance of the set screw channels on the gas block I plan to install and that is what determines which jig to purchase? |
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Posted: 2/19/2020 11:13:07 PM EDT
[#4]
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Posted: 2/19/2020 11:22:11 PM EDT
[#5]
Quote HistoryQuoted: @AvalonRifle How can I tell which one that is? Looks like there is more than one jig with a reference to Geissele in the description. I see one for $90 and another for $55. It’s a little confusing for a novice. You’re saying I need to measure the center-to-center distance of the set screw channels on the gas block I plan to install and that is what determines which jig to purchase? For a novice, you are asking the proper questions. Yes, that's exactly what you need to do. If you are going to use a particular Geissele block, find out what the center distance is for the set screws used for that block. Then send Jake a note and ask him which jig to order. Jake is a good engineer, good machinist, and a very straight up guy. He is also very responsive to technical questions. Also be advised that he manufactures and sells a couple varieties of product. One grade is a straight tool steel jig that is made for occasional users. The other is a drill shaft insert hardened steel product that is meant for frequent users. I have never bought one of the latter. The cost differential is substantial. |
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Posted: 2/19/2020 11:27:35 PM EDT
[#6]
The hole under the gas port will always be aligned properly.
The second forward hole might be a little different depending on the jig and gas block. Easy enough to eyeball the second housing the gas block and a pencil if they don't line up correctly. |
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Posted: 2/19/2020 11:29:15 PM EDT
[#7]
Quote HistoryI've got the SLR one and it's phenomenal.
I suggest getting a carbide bit too. I tried a titanium nitride bit and it didn't touch my nitride barrels. Carbide bit drilled out in 10 seconds. |
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Posted: 2/19/2020 11:30:23 PM EDT
[#8]
Quote HistoryI use SLR titanium gas blocks pretty much exclusively. But I have never used one of their jigs. I would rather not use an aluminum jig.
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Posted: 2/19/2020 11:31:47 PM EDT
[#9]
Quote HistoryQuoted: I use SLR titanium gas blocks pretty much exclusively. But I have never used one of their jigs. I would rather not use an aluminum jig. Align the centering screw in the gas port:  Attached FileFlip the barrel over and drill the holes through the alignment screws. Really easy and almost foolproof.  Attached FileI've done about 10 barrels with mine and it looks brand new. |
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Posted: 2/19/2020 11:34:48 PM EDT
[#10]
Quote HistoryQuoted: You don't make contact with the AL, you drill through the hardened steel alignment screw. Align the centering screw in the gas port: https://www.AR15.Com/media/mediaFiles/322543/20190913_123807_jpg-1283439.JPG Flip the barrel over and drill the holes through the alignment screws. Really easy and almost foolproof. https://www.AR15.Com/media/mediaFiles/322543/20190913_123534_jpg-1283437.JPG |
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Posted: 2/19/2020 11:37:20 PM EDT
[#11]
I would also recommend picking up some Birchwood Casey super blue. After you drill out the dimple the barrel will not be protected. Takes a few seconds to blue it and you never have to worry about it again.
Its not necessary, but if youre going to do something right always make it look professional! |
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Posted: 2/19/2020 11:40:15 PM EDT
[#12]
This what I’m looking for?
https://www.homedepot.com/p/Drill-America-11-64-in-Solid-Carbide-Twist-Drill-Bit-DMOD11-64/305322319 |
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Posted: 2/20/2020 12:20:05 AM EDT
[#13]
Quote HistoryYes, but I believe you need 5/32". I would think 11/64 would work, but I don't know for sure. 5/32" definitely works. This is what I use. It's expensive at $16, but it gets the job done and will probably last forever.  
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Posted: 2/20/2020 9:12:23 AM EDT
[#14]
For those who won’t use an aluminum jig. link
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Posted: 2/20/2020 9:31:58 AM EDT
[#15]
Quote HistoryBRD also makes one for multiple gas blocks.
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Posted: 2/20/2020 9:40:22 AM EDT
[#16]
The jigs look ok, they are cheaper than they used to be. I use a spare gas block as a jig, it was a cheap $10 steel one. Use one hole for set screw to hold in place, the other as the drilling hole, and reverse it.
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Posted: 2/20/2020 12:02:34 PM EDT
[#17]
Quote HistoryQuoted:
The jigs look ok, they are cheaper than they used to be. I use a spare gas block as a jig, it was a cheap $10 steel one. Use one hole for set screw to hold in place, the other as the drilling hole, and reverse it. |
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Posted: 2/20/2020 12:06:42 PM EDT
[#18]
Another vote for SLR jigs, I have two of them and have had excellent results.
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