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Posted: 2/1/2015 8:27:17 PM EDT
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I'm almost finished with my first build I'm just waiting on my bolt carrier. I was told that i need to by a gauge type tool that goes in my upper receiver to make sure my gas line is correct? If this is true what is this tool called. Any help would be great.
Thank you |
If the gas tube goes straight into the upper, you shouldn't need any kind of gauge to tell if it's lined up right. When you do insert your carrier into the upper, go slowly and watch for binding when the key finds the tube. It's not likely you'll see that, but careful is better than ticked off about bunging up a gas tube. 
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Quoted:
If the gas tube goes straight into the upper, you shouldn't need any kind of gauge to tell if it's lined up right. When you do insert your carrier into the upper, go slowly and watch for binding when the key finds the tube. It's not likely you'll see that, but careful is better than ticked off about bunging up a gas tube. Quoted:
If the gas tube goes straight into the upper, you shouldn't need any kind of gauge to tell if it's lined up right. When you do insert your carrier into the upper, go slowly and watch for binding when the key finds the tube. It's not likely you'll see that, but careful is better than ticked off about bunging up a gas tube. What he said and make sure it's just the carrier, if you feel drag, you have to adjust the tube. Find out where the dragging point is and adjust the gas tube by slightly pulling or pushing with your fingers. Remember it's almost like the adjustments are backwards because your fulcrum is the hole in your upper. Quoted:
He said it was to make sure the bolt carrier hits the primer just right. But that doesn't make sense to me because if the upper and the bolt carrier are both mil spec should it matter? The tool is for the bolt, go,no-go gauges, and that has to do with headspace. Remember "milspec" are considered tolerances, could be - OR + so if you have "stacked tolerances" then the components will be compacting on one another |
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Quoted: If the gas tube goes straight into the upper, you shouldn't need any kind of gauge to tell if it's lined up right. When you do insert your carrier into the upper, go slowly and watch for binding when the key finds the tube. It's not likely you'll see that, but careful is better than ticked off about bunging up a gas tube. |
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Do you need a tool to make sure the gas line is correct? Or a tool that makes sure the carrier hits the primer right? I'm just as confused about your build as you are. ***DISCLAIMER*** Though I am a certified colt armorer, I do not condone nor do I think it is a good idea to perform these things without the proper training. You could injure yourself, someone else or break stuff. Now that the legal stuff is out of the way. Are you talking about the gas tube alignment? Assuming your putting the proper gas tube (I.E. Pistol, carbine, mid, rifle length) then follow the instructions given above. There is a tool to check the firing pin is protruding enough to hit the primer through the bolt face called a firing pin protrusion tool, it will check if your firing pin to make sure it has proper clearance to strike the primer. (Usually looks like an elongated "H", pass/fail) Also, technically the carrier does not strike the primer, it is the firing pin that rides in the bolt carrier group. I am not trying to sound condescending but trying to break it down as easy as possible. |
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Quoted:
I'm almost finished with my first build I'm just waiting on my bolt carrier. I was told that i need to by a gauge type tool that goes in my upper receiver to make sure my gas line is correct? If this is true what is this tool called. Any help would be great. Thank you No...your eyes are all you need. |
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Only Guage for the bolt i can think of I'd head spacing . Nope, there is also a firing pin protrusion gauge, which isn't technically gauging the bolt, but it's important. And unlikely to be needed with a build of all new parts. The most likely point you'd need it would be in testing a gun that's been in service for a long time. |
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