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Posted: 1/24/2009 12:33:28 PM EDT
I saw this on GB a week or so ago, I got it for about $25.
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That is the only piece of paper that it came with, and it's a solid piece. I don't know if Integrated Machine Systems made it or just did the spec test or both. I need to get an ejector removal tool and try it out on my builds. USGI headspace gages (like yours) are already clearanced for the ejector/extractor...just drop them in a clean dry chamber and a clean bolt face and see if the carrier locks all the way shut. |
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Quoted:
That is the only piece of paper that it came with, and it's a solid piece. Then it's really just a GO/NO-GO gage??? That's disappointing...I may be tempted to make up a compressible (using teeny tiny o-ring) head gage myself...One that could be measured with a mic/verniers after chambering... Right now, I just use plastic shimstock stuck to a resized cartridge case (since I'm only interested in my own individual rifles). Good to .001"...which is close enough for me... 
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Quoted:
Quoted:
That is the only piece of paper that it came with, and it's a solid piece. Then it's really just a GO/NO-GO gage??? That's disappointing...I may be tempted to make up a compressible (using teeny tiny o-ring) head gage myself...One that could be measured with a mic/verniers after chambering... Right now, I just use plastic shimstock stuck to a resized cartridge case (since I'm only interested in my own individual rifles). Good to .001"...which is close enough for me...  That is FIELD reject gage. If the bolt closes on this gage, replace the bolt and test again...if it still fails you will have to replace the barrel/collar assy. 99.9% of the time a new bolt will fix it. |
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Quoted:
Quoted:
That is the only piece of paper that it came with, and it's a solid piece. I don't know if Integrated Machine Systems made it or just did the spec test or both. I need to get an ejector removal tool and try it out on my builds. USGI headspace gages (like yours) are already clearanced for the ejector/extractor...just drop them in a clean dry chamber and a clean bolt face and see if the carrier locks all the way shut. Cool, Thanks for the information! 
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Quoted:
Sould every Retro build (Used A1 milsurp complete barreld upper ) have a GO/no go gage test before usage ?  Again - it's a Field gauge, which is the absolute minimum to be fielded by the Army. I bought one because I think it's a good precaution - cheap insurance for the $30 I paid for mine. Bought one for my best friend as well. In other words, a bolt might close on a no-go gauge but still be safe to fire if it doesn't close on a field gauge. If it DOES close on a field gauge, then headspace is unsafe. Unless you are a gunsmith an entire set of gauges probably isn't necessary IMO. I doubt you'd ever use a go gauge, for example. This is the gauge used by armories to test whether a weapon could be reissued or not. If you are looking for closer tolerances, get a no-go gauge. |
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