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Posted: 2/5/2013 8:49:36 AM EDT
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What low profile gasblock will I want to run on my 11.5" SBR? Are they all similiar?
I have a Noveske NSR coming that I want to use for it. |
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Is there a difference in internal diameter between them or are they all the same?
eg. Rainier Arms |
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Quoted:
Does the Rainier Arms one just slip on? And do I need to know the size of the gasport in order to get one? If so how can I measure that? Back out the set screws, put a little oil on the barrel and it will slide right on. Sometimes it needs a little coaxing if tight. All you have to know is the diameter of your barrel. It's usually a .750" or a .625" (light weight barrel). No need to measure the gas port. The gas block you linked may be loose on most barrels. |
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As already mentioned, get the gas block that you like better, they are mostly the same except for looks and how they mount unless you want an adjustable one.
Only thing you need to match is the inside diameter (ID) of the gas block measurement like .750" with the outside (OD) diameter of your barrel, obviously you can't use a .750" gas block on a .625" barrel or vice versa. YHM gas blocks are as good or better than more expensive ones, buy with confidence. I second the steel gas block as a good thing. I wouldn't buy an aluminum gas block for any of my sticks. |
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The proper way to install them is by pinning them to the barrel. Rainier does this for $30. I would generally agree with you, if this was regarding a tower FSB that is exposed and runs a very real risk of being torqued/torsioned rotated. With a low-profile gas block, the risk of this is so low as to be a non-issue and therefore pinning is an unnecessary added expense. Can do it to make you feel better or if it is a duty/competition rifle that may see abuse or extra-heavy use during it's life cycle. YMMV. |
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Quoted:
Quoted:
The proper way to install them is by pinning them to the barrel. Rainier does this for $30. I would generally agree with you, if this was regarding a tower FSB that is exposed and runs a very real risk of being torqued/torsioned rotated. With a low-profile gas block, the risk of this is so low as to be a non-issue and therefore pinning is an unnecessary added expense. Can do it to make you feel better or if it is a duty/competition rifle that may see abuse or extra-heavy use during it's life cycle. YMMV. I actually never thought about it that way. It makes total sense considering a lo-pro GB will usually be UNDER the rail as well. Learn something new everyday! Thanks! |
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I know several people who have had set screw gas blocks come loose. Valid point. And it can happen, just very unlikely provided properly installed. For an occasional or range gun, i don't think pinning a low-profile gas block makes economical sense unless you have the means to do yourself (the cost of time) or it comes from the OEM already pinned. I do agree a properly pinned gas block is stupid strong and reliable, just not a must-have for most of us. |
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Didn't mean to imply safe-queen either. I have a couple sticks with many thousands (4-5K) each through them with set-screw mounted
low-profile gas blocks (both YHM low-pros) that have been rock solid performers. One on a stainless 10.3" 300 Blkout and the other on a cut down (to 10.5") 5.56 M4 profile Green Mountain melonited barrel. These rifles get used, just not competition or every day in the stan used. My 300 is my next to the bed rifle too. I'm curious now, how many that use low-pro gas blocks and installed themselves have them pinned on top of set-screw? Be an interesting poll. OP - You can't go wrong pinning your gas block unless you intend to swap parts semi-often. |
| I have a setup for pinning Troy or Vltor lo pro blocks, but quit doing it went instead with a dimple jig.Couple of nice dimples and red lock tite, and it will not come off without heating it with a torch to break the lock tite.I have removed a few after a few thousand rounds and could not budge the set screws without heat. |
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Awesome. Thanks for the reply guys. I actually just bought a noveske barrel last night (10.5") that came with a pinned gas block. I won't have to worry about the low profile gasblock on this gun anymore.
However, this information is going to be helpful when I find a NSR in the 13.7" variety on my other upper! Thanks a lot guys. |
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