Poll: Has your build failed a headspace check?

[SrMachoSolo]

Finishing up assembly of my .308 AR10, seen a lot of debate about go, no go, and field gauges to check headspace.

I'm wondering, how many people here have had issues?

The advice I've seen that makes the most sense is that new parts should be good to go, while mixing and matching used BCG or barrel is suspect, and both used parts means don't bother.

-Robert

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[RobMa]

I personally think it's critical to check it regardless of whether or not you buy from a reputable company or build it yourself.

 

[TTSX]

Never had issues but have seen the results of people who did. It's less than the price of your barrel for a set of gauges and they last forever. Don't know why people wouldn't have them around

 

[Nosferatu]

Check it. If you don't want to buy gauges, you can rent them here: https://www.reamerrentals.com/SearchResults.asp?Cat=87

 

[CamoDeafie]

First build, the Sarco M4gery 16", came with matched bolt, passed headspace. Second build, M733ish AR pistol in 6.5 Grendel, was pieced together over the last year. @Velzey did the barrel work and confirmed headspace good to go.

 

[ma96782]

No problem.....buy the complete assembled upper with bolt carrier group.

Of course......if you insist.....well, have the gauges to check.

Aloha, Mark

 

[CamoDeafie]

No problem.....buy the complete assembled upper with bolt carrier group.

Of course......if you insist.....well, have the gauges to check.

Aloha, Mark

As far as I know; no one sells an assembled 12" 6.5 Grendel upper with a C7/733/late A1 receiver and a triangle Front Sight Base of course that makes things way more interesting

 

[ma96782]

In that case......surely then.......one could afford the gauges.

Aloha, Mark

 

[CamoDeafie]

In that case......surely then.......one could afford the gauges.

Aloha, Mark

Yeah, I had a gunsmith drill, ream and taper pin the barrel and FSB together, and assembled the upper for me, and he checked headspace with go/no-go to confirm that the combo worked with the AIM bolt.. and to avoid the potential messup of having bought the wrong bolt for the chamber, again due to a few barrel companies making variants on the 6.5 Grendel chamber (.264 LBC and Black Hole Weaponry who chambered the barrels for .125 X39 bolt faces vs the SAAMI Grendel/Beowulf .136 bolt face)

 

[Koda]

curious how many new rifle or complete upper assembly purchases have failed a headspace check?

 

[Ben B.]

Not yet, but only 9 builds.

 

[billdeserthills]

I built 3 AR-10's, took them out to try them-- First one fired but jammed , second & third one wouldn't even fire. So I swapped BCG's with 1st & 2nd ones & then they both worked good, after some break-in. Third one wouldn't work, even after swapping BCG's with the others & it wouldn't even accept the Go gauge. I determined the bolt end was a bit too long and gave it a taste of the grinder-- Then it finally closed over a cartridge & the Go gauge. I realized the grinder had taken too much off & ordered another bolt & that finally fixed the problem

AR10 Magnum 308 Bolts Accuracy Systems Gunsmith AR 10

Custom AR10 Rifles built by Accuracy Systems Inc. ASI does custom gunsmithing, builds Custom Rifles and rifle Rebarreling on AR10 rifles.

www.ar-10-rifles.com

 

[Stomper]

Yeah, I had a gunsmith drill, ream and taper pin the barrel and FSB together, and assembled the upper for me, and he checked headspace with go/no-go to confirm that the combo worked with the AIM bolt.. and to avoid the potential messup of having bought the wrong bolt for the chamber, again due to a few barrel companies making variants on the 6.5 Grendel chamber (.264 LBC and Black Hole Weaponry who chambered the barrels for .125 X39 bolt faces vs the SAAMI Grendel/Beowulf .136 bolt face)

NERD!!!