The GO gauge is used to measure the minimum allowable, safe chamber headspace. If the bolt does not close on a Go gauge, it is considered unsafe. The NO-GO gauge is used to measure the Maximum recommended chamber headspace. If the bolt closes on a NOGO gauge, it is out of the new or recomended good condition range.
C**.
NO GO gauge is incorrect length.
Go gauge works fine, no go gauge is 1.4666 instead of 1.46706 or 1.4670, which caused me to freak out when I tried it and my rifle failed. No go gauge is short and a NO GO.
C**C
A must have for Shooters or Gunsmiths
if you know what your doing you can save yourself a lot of money whether its checking headspace on a newly built rifle or checking it on an older one before you buy, checking to see if you will have to install a new barrel costing you more money. they are high quality they ship in bubble wrap and are well worth the money, if you are going to pay a gunsmith to do it invest in these instead. however i do recommend you get an extractor tool before you have to hunt around your workshop like i did if your checking it on an ar15
S**E
Explody guns cost extra
If you don't want your newly built gun to go all explody on you, its a good thing to invest in.
M**R
A must have
A must have for your AR build and I am very pleased with the quality and price. I ordered these gauges after a series of malfunctions with a rifle for the past 6 months. Turns out, it's a headspace issue and we caught it before something catastrophic happened. I would recommend these gauges to someone who buys used rifles or is building their own.
D**O
... 5 stars if each had a color band for easy distinction between go and no-go
Would give it 5 stars if each had a color band for easy distinction between go and no-go.
A**E
Five Stars
Awesome set of gauges. So simple to use.
C**)
These are a must if you are doing a rifle build.
Fast delivery, good product, fair price. Thank you.
M**S
Correct go/no-go gauges for my AR build bench
Exactly what I needed for checkout before taking the new build to the range.
