.308/7.62x51 Go/No-go gauge

[RobertH]

i am assembling a 308 AR.  when my Midway USA parts show up, i will be just about done.  since i'm using different parts from several companies i would like to check headspace on the barrel.  anyone have a .308 or 7.62x51 Go/No-go gauge i can borrow?

[whatsit]

Are you installing your own barrel extension?
Forgive my ignorance, but I have read the extension (on the ar-15 platform) is what sets the headspace and once it is installed, you don't really need to do it again.
Maybe the ar-10 platform is different. I bring it up mostly out of curiosity to see if you know something I don't.

[RobertH]

well im a noob when it comes to go/no-go gauges.  ive never headspaced any AR15's i've assembled.  but since the LR-308/AR10's are completely different since there is nothing that is "standard" i just want a little more confidence before shooting it.  im in no rush, as i am not close to being done yet.  everything i am building is DPMS styled, so it should be all GTG, but we'll see after i put everything together.

so should i even worry about checking headspace?

[shooter]

 maybe you should let someone else fire it first!

[OnTheFly]

maybe you should let someone else fire it first!

Maybe SemperFiGuy would like to volunteer.   

Fly

[bkoenig]

I wouldn't worry about it.  Headspace is set when the barrel extension is installed.

[SemperFiGuy]

Maybe SemperFiGuy would like to volunteer.

Well, now, that's a tender thought.

But I was flame-hardened in a culture that sez, "never, never ever volunteer".   ['Cause you'll get shoved right into the middle of it quick enough.]

sfg

[NE Bull]

Well, now, that's a tender thought.

But I was flame-hardened in a culture that sez, "never, never ever volunteer".   ['Cause you'll get shoved right into the middle of it quick enough.]

sfg

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