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Posted: 3/2/2021 9:26:28 PM EDT
[#1]
Quote HistoryQuoted: Design is for alignment purposes. Surely there is some anti rotation effect inherent to the design but how much I couldn't say. It could definitely be reworked to be a workable feature designed into the setup. Just found it interesting in design and it'd take all user error out of alignment. GB comes with a dimple (pilot) for pin , BTW. And IIRC, no provision for set screws. Another pic with the hole drilled for pin: https://www.ar15.com/media/mediaFiles/416992/Screenshot_20210302-191325_Gallery_jpg-1848951.JPG Quote HistoryQuoted: Quoted: Quoted: Quoted: Skinning the cat comes many ways. Monty at Centurion Arms has method that I have interest in..... https://www.ar15.com/media/mediaFiles/416992/image1_jpeg_optimal_jpeg_jpg-1848454.JPG Would have though the gb issue would be more launching forward than rotating. Never seen either personally though, so what do I know. Design is for alignment purposes. Surely there is some anti rotation effect inherent to the design but how much I couldn't say. It could definitely be reworked to be a workable feature designed into the setup. Just found it interesting in design and it'd take all user error out of alignment. GB comes with a dimple (pilot) for pin , BTW. And IIRC, no provision for set screws. Another pic with the hole drilled for pin: https://www.ar15.com/media/mediaFiles/416992/Screenshot_20210302-191325_Gallery_jpg-1848951.JPG |
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Posted: 3/2/2021 9:49:07 PM EDT
[#2]
Quote HistoryQuoted: OK yep, I gotcha. Pretty cool, interesting to see something new in any case. Quote HistoryQuoted: Quoted: Quoted: Quoted: Quoted: Skinning the cat comes many ways. Monty at Centurion Arms has method that I have interest in..... https://www.ar15.com/media/mediaFiles/416992/image1_jpeg_optimal_jpeg_jpg-1848454.JPG Would have though the gb issue would be more launching forward than rotating. Never seen either personally though, so what do I know. Design is for alignment purposes. Surely there is some anti rotation effect inherent to the design but how much I couldn't say. It could definitely be reworked to be a workable feature designed into the setup. Just found it interesting in design and it'd take all user error out of alignment. GB comes with a dimple (pilot) for pin , BTW. And IIRC, no provision for set screws. Another pic with the hole drilled for pin: https://www.ar15.com/media/mediaFiles/416992/Screenshot_20210302-191325_Gallery_jpg-1848951.JPG KAC Mod 2 GB looks like another great idea. Index notch in barrel for lug on GB in combination with a castle nut for securement. Looks pretty damn solid. |
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Posted: 3/3/2021 10:51:37 PM EDT
[#3]
I prefer a pinned gas block. But I don’t have the setup at home to do them myself.
So, I dimple with a jig directly opposite the hole and use Rocksett. With a good dimple, 10 in-lbs is enough. Don’t gorilla torque it and you won’t have to worry about barrel stresses affecting accuracy. If you’ve ever seen the inside of a gas block, you don’t need a Bridgeport for proper alignment to cover that hole. |
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Posted: 3/4/2021 5:18:38 PM EDT
[#4]
I'd go with pinned gb if exposed or if serves as a mount, or dimpled if under the rail + blue loctite.
The dimpling is quite helpful to set gas block to top dead center with tight gas block mounting area which very useful recently with a green mountain 7.62x39 barrel and slr gas block build -- just torque and loosen a few times to align. I send barrels to adco for $10 single dimples or for the pin job. |
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Posted: 3/4/2021 8:42:38 PM EDT
[#5]
I dimple and pin them. only use steel g/b also
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