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 02-24-2010, 01:24 AM | #1 | Supporting Member Join Date: Sep 2007 Posts: 3,885 |  Changing a gas block
How hard is it to properly align a gas block when you install one? | 
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| 02-24-2010, 02:49 AM | #2 | Supporting Member Join Date: Sep 2007 Posts: 3,885 |
Is there a way to make sure it's dead-nuts on? I'm worried about sight alignment. | |
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| 02-24-2010, 04:11 AM | #3 | Senior Member Join Date: Oct 2009 Location: St. Louis, Missouri Posts: 1,126 |
Center your rear sight (mechanical zero) and test fire. If the alignment is off, loosen the set screws on your gas block and turn it slightly in the direction of your POI. (eg. If it's shooting to the right - turn the gas block to the right.) Tighten set screws and test fire again. Repeat as necessary. __________________
What is this 100m you speak of?! Here in AMERICA we shoot in YARDS boy, a meter is something I use to measure voltage with.
-- Dillinger
Wer anderen etwas vorgedacht, wird jahrelang nur ausgelacht.
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Last edited by Highpower; 02-24-2010 at 04:03 PM.Reason: added POI clarification | |
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| 02-24-2010, 10:12 PM | #4 | Dead Wolves = Good Wolves Join Date: Nov 2009 Location: Rochester WI, Rochester WI Posts: 6,944 |
Quote:
Originally Posted by matt g
Is there a way to make sure it's dead-nuts on? I'm worried about sight alignment.
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if your using a picatinny block you can level the receiver then level the block. same as leveing a scope in a way. | |
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| 06-20-2010, 08:41 PM | #5 | Supporting Member Join Date: Jun 2010 Location: , Tennessee Posts: 1,815 | Gas Block Alignment
Matt,
I usually take a small bubble balance square 5" And bubble balance the flat top receiver cross-ways to be sure it is square in the vise. Then I repeat the same procedure on the gas block picatinny rail. Both should be level with each other. Very seldom do I have a sight problem if installing a flip up front. However mostly I use the Gas Block to do away with the iron sights and put a scope on a rifle. | |
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| 08-17-2010, 03:37 AM | #6 | Senior Member Join Date: Dec 2009 Location: Clermont, FL, Florida Posts: 142 |
May be a stupid question, can any AR have that tall front sight gas block be replaced with a low profile gas block, another question I always wondered does that traditional sight get in the way of scopes or dot sights? seems like it would | |
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| 08-17-2010, 04:59 AM | #7 | Game on... Join Date: Aug 2009 Location: Sewell, NJ Posts: 3,297 |
Quote:
Originally Posted by Mossyoakman3006
May be a stupid question, can any AR have that tall front sight gas block be replaced with a low profile gas block, Yes, but getting it off can be a real PITA
another question I always wondered does that traditional sight get in the way of scopes or dot sights? seems like it would. A properly mounted red dot sight should cowitness the A2 sight tower, if the tower obstructs the view the optics are mounted too low. High end sights like EOtech $$$ are designed to mount correctly with the tower in place
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10 characters __________________
"His nuts...they gone." - Karen "Bullseye" Smith
"A free people ought not only to be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government." - George Washington | |
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| 08-17-2010, 05:59 AM | #8 | Supporting Member Join Date: Apr 2010 Location: Boise, Idaho Posts: 2,442 |
Quote:
Originally Posted by Mossyoakman3006
... another question I always wondered does that traditional sight get in the way of scopes ... seems like it would
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An interesting thing happens with scoped ARs, even though you'd swear the FSB would have to block the line of sight, if the scope is say 4x or more the telephoto effect often gets the FSB out of view. The first time I tried it I was amazed and had to move my finger up the FSB until I saw its blur through the scope. Such a scope would have to be mounted real low for the FSB to be a problem. If that's the only reason you're considering a low profile gas block it's sure worth a little testing before going to all that trouble especially if the standard FSB already cowitnesses properly with your RDS.
Last edited by Quentin; 08-17-2010 at 06:01 AM. | |
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| 08-17-2010, 10:22 AM | #9 | Senior Member Join Date: Dec 2009 Location: Clermont, FL, Florida Posts: 142 |
Thanks thats alot of help | |
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| 10-20-2010, 11:55 PM | #10 | The Balls Join Date: Feb 2010 Location: Solvang Posts: 905 |
I just got a new, lighter barrel and a new gas block. The barrel is blank, it has no indentations for set screws or grooves for taper pins  . Do set screws not need indentations? If they DO need indentations, what's the best way to go about making them? | |
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