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Posted: 5/8/2017 8:24:28 PM EDT
[#1]
Yes, it's possible - but not very common, so it's not unusual you wouldn't see it on a regular price sheet. Ask about the price.
If your gas block mounts with pins, there will be some work to be done there, redrilling for the new gas block, or matching the existing pin locations on the new gas block, if the turn-down doesn't remove the grooves from the barrel. If it's a set-screw, the dimple(s) will likely have to be redone. |
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Posted: 5/9/2017 10:22:25 PM EDT
[#2]
You can, but I'd stop at 0.875" instead of going all the way down to .750" on the first go.
Might also want to think about having the barrel sent out for cryo treatment afterwards, just to relieve any stress changes from the turning. Though you could shoot it first and see if there was a significant change or not after being turned. |
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Posted: 5/10/2017 6:39:55 PM EDT
[#3]
Thanks guys, good feedback.
I especially like the 875 gas block idea. |
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Posted: 5/10/2017 11:23:28 PM EDT
[#4]
Some gas block makers with make one with a custom diameter. I have one I ordered after turning the barrel so I could measure the exact diameter. This one came from Accuracy Speaks, and it's not suitable for a standard AR.
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Posted: 5/11/2017 9:12:28 PM EDT
[#5]
I used to make FSBs to fit odd diameters for barrels I bought off ebay and turned/chambered to fit an AR profile of some sort. It was a neat afternoon project in the garage.
Any ideas where I can find more of these raw forgings? 
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Posted: 5/17/2017 3:07:10 PM EDT
[#6]
Try to stick with 'standard' [round] dimensions.
Odd sizes are NOT usually a commodity item. A custom hemispherical cutter is not a low cost item. You can generally get them in any size you might want but lead time and cost are NOT insignificant. |
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