AR 15 Bolt Tail

[markm]

This thread is going to send a bunch of guys into a "tail" spin.... measuring every bolt in their collection.

[lysander]

This thread is going to send a bunch of guys into a "tail" spin.... measuring every bolt in their collection.

If this applies to you, use a micrometer, not calipers.

[prepare]

If this applies to you, use a micrometer, not calipers.

What about these? Or do you think a micrometer is better?

Bolt Tail Gauges.jpeg

[the AR-15 Junkie]

NO GO is .2496

Field is .248

https://i.imgur.com/T6ElBQn.jpg

[markm]

If this applies to you, use a micrometer, not calipers.

Noted. Although in 30 years on the platform, I've never had to check that measurement.

[prepare]

What does the mil use to measure the bolt tail?

[lysander]

What does the mil use to measure the bolt tail?

Either gauges like the ones you pictured or snap gauges.

[markm]

If you gauge the tail, do you gauge the carrier?

[prepare]

If you gauge the tail, do you gauge the carrier?

Yes. With a plug gauge.

[markm]

Is this thread REALLY happening?