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Posted: 10/1/2004 5:46:33 AM EST
Which ones do I need? I know nothing about them so any explanations are welcome.
Link Posted: 10/1/2004 5:51:15 AM EST
[Last Edit: 10/1/2004 5:52:42 AM EST by RED_5]
bolt should close on a GO (good headspace)
bolt should NOT close on a NO-GO (excessive headspace, a "no-go" item, but may be used if it passes the Field Guage test;
bolt should NOT close on a Field Guage (really excessive headspace)


eta; I recommend the GO and NO-GO. Don't mess around with a field guage. (ymmv)
Link Posted: 10/1/2004 5:53:20 AM EST
[Last Edit: 10/1/2004 5:54:36 AM EST by mr_wilson]
Bushmaster sells a fine set of go - no go gauges or the field guage, I have both, but the go -no go ones would be my recommendation, get them from here: www.bushmaster.com

As to how to use 'em, it's pretty self-explantory, place guages in chamber, bolt should close on the go gauge and not close (go into battery) on the no go, easy peesy japaneesy.

Mike

dang I'm getting slow in my old age..........
Link Posted: 10/1/2004 6:18:44 AM EST

Originally Posted By mr_wilson:

dang I'm getting slow in my old age..........

I know the feeling.

Does the extractor have to be removed on the Go/No Go guages, or do I just drop them in and close the bolt?
Link Posted: 10/1/2004 7:13:49 AM EST
[Last Edit: 10/1/2004 7:14:19 AM EST by mr_wilson]
Don't really know if one should, (seems I heard that somewhere too) but I never remove mine when I'm using them, then again I only use them to check when I've built and upper or replaced a barrel and it ain't never hurt an extractor or the gauge that I've experienced. Not like I use them daily and I never use them on completely new uppers bought with a carrier and bolt installed.

Good question tho, perhaps others will chime in with their take on this.......

Mike
Link Posted: 10/1/2004 7:17:42 AM EST

Originally Posted By bigkracka:


Does the extractor have to be removed on the Go/No Go guages, or do I just drop them in and close the bolt?



depends on the guage.
some you do, some ya don't


you do not want anything influencing the guages.
Link Posted: 10/1/2004 7:20:54 AM EST
I was looking at the Forster guages at Midway HERE It's in .223 Rem I guess they will work in a 5.56 chamber?
Link Posted: 10/1/2004 4:16:51 PM EST
[Last Edit: 10/1/2004 4:17:31 PM EST by bigkracka]

Originally Posted By bigkracka:
I was looking at the Forster guages at Midway HERE It's in .223 Rem I guess they will work in a 5.56 chamber?



Bueller?.........
Link Posted: 10/1/2004 7:49:45 PM EST
Read the FAQ. You need headspace gauges made for M16's. Semi and full autos have a looser chamber than a bolt action.
Link Posted: 10/2/2004 4:46:12 AM EST
OK !!

here is my experience.., "GO" & "NO-GO" are useless in checking headspace on most AR-15s !!

i have three NIB Colts & one Bushmaster that lock up on the "NO-GO" gage, i have 5 AR-15s i shoot regularly that don't lock up, while on the other hand i have two NIBs that will NOT lock up & 5 other shooters that will NOT lock up !!

but if any one wants to trade their "FIELD" gage for my "NO-GO"..., let me know !!
Link Posted: 10/2/2004 5:24:13 AM EST
Ok, what's a field guage?
Link Posted: 10/3/2004 12:53:32 PM EST
You guys that have new barrels and bolts that close on a .223 No Go, I will buy them off you for $25 so you don't have a total loss.
Link Posted: 10/3/2004 1:58:35 PM EST
It seems like there is no clear answer and I don't see a flurry of my rifle blew up due to bad headspace threads. Some say I can swap the b/c/ch between uppers so that's what I'm gonna do.
Link Posted: 10/3/2004 5:52:58 PM EST

Originally Posted By AR-15NUTT:
OK !!

here is my experience.., "GO" & "NO-GO" are useless in checking headspace on most AR-15s !!

i have three NIB Colts & one Bushmaster that lock up on the "NO-GO" gage, i have 5 AR-15s i shoot regularly that don't lock up, while on the other hand i have two NIBs that will NOT lock up & 5 other shooters that will NOT lock up !!

but if any one wants to trade their "FIELD" gage for my "NO-GO"..., let me know !!



I agree, a Field is the only one to buy.
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