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Posted: 10/15/2009 3:05:50 PM EDT
| I'm looking at getting the Larue low profile gas block. Their website says the barrel must be machined for the set screws. My barrel is a Shilen and it's round where the gas block would be. Does it make a difference if it's round or has a flat spot for the set screws? |
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Quoted:
I'm looking at getting the Larue low profile gas block. Their website says the barrel must be machined for the set screws. My barrel is a Shilen and it's round where the gas block would be. Does it make a difference if it's round or has a flat spot for the set screws? Just dimple the barrel where the screws go and rest confidently knowing that your gas block is fine. That's what I did. The easy way (at least IMO) is to: 1. Install the gas block w/o dimpling the barrel just tighten the screws down on the barrel. 2. Test fire barrel to ensure gas block is properly aligned. 3. Remove ONE of the screws. 4. Using a drill stop and quality bit, dimple the barrel through the hole the screw was removed from. 5. Reinstall screw with loctite. 6. Remove the other screw. 7. Using a drill stop and quality bit, dimple the barrel through the hole the screw was removed from. 8. Reinstall screw with loctite Gas block is now installed and the screw are secured in the dimples you drilled ETA: When drilling you have to be very careful and not booger up the threads where the sets screws thread into the block |
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Quoted:
Quoted:
I'm looking at getting the Larue low profile gas block. Their website says the barrel must be machined for the set screws. My barrel is a Shilen and it's round where the gas block would be. Does it make a difference if it's round or has a flat spot for the set screws? Just dimple the barrel where the screws go and rest confidently knowing that your gas block is fine. That's what I did. The easy way (at least IMO) is to: 1. Install the gas block w/o dimpling the barrel just tighten the screws down on the barrel. 2. Test fire barrel to ensure gas block is properly aligned. 3. Remove ONE of the screws. 4. Using a drill stop and quality bit, dimple the barrel through the hole the screw was removed from. 5. Reinstall screw with loctite. 6. Remove the other screw. 7. Using a drill stop and quality bit, dimple the barrel through the hole the screw was removed from. 8. Reinstall screw with loctite Gas block is now installed and the screw are secured in the dimples you drilled ETA: When drilling you have to be very careful and not booger up the threads where the sets screws thread into the block Good info, thanks. |
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I'm using the Larue lo pro gas block on my 16" M4 profile barrel.
I didn't dimple the barrel, just used the red loctite, and tightened the crap outta the set screws. After 3k+ rounds it hasn't moved, yet. If it moves in the future, I'll dimple it. I would save yourself the worry and dimple it the first time tho. |
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