No barrel markings

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[ARCHIVED THREAD] - No barrel markings

Posted: 7/10/2009 5:47:26 PM EDT

Trying to figure out if my AR is chambered .223 or 5.56.

I can't find any markings, got the rifle from a gun show a few months back, it appears to be a homebuild.

Any ideas of how I can figure this out without hurting me or my rifle?

Posted: 7/10/2009 8:48:13 PM EDT

[#1]

See if it will run with 5.56 nato ammo.

If the chamber is 223, then the pressure will be only slightly over the top ( just enough to keep the rifle from cycling correctly, and not enough over pressure to do any damage to the rifle.

Posted: 7/11/2009 5:43:39 AM EDT

[#2]

Or you could check headspace with a headspace gauge.

Posted: 7/12/2009 8:21:30 AM EDT

[#3]

Really do a good close job of looking at this bbl. for any markings. My bbl markings are very lite and really tough to find and read.

Posted: 7/12/2009 9:02:46 AM EDT

[#4]

Have it checked a gunsmith will usually charge $20.00 to do it for you. If it's not he can ream it to 5.56.

Posted: 7/12/2009 6:05:16 PM EDT

[#5]

.223 or 5.56 gage

Posted: 9/17/2009 10:28:38 PM EDT

[#6]

Check under the handgaurds, sometimes they are obscured by those

Posted: 9/18/2009 6:39:44 AM EDT

[#7]

Quoted:
Check under the handgaurds, sometimes they are obscured by those

That's where mine is marked. Top of the barrel under the handguards. Hard to see in dim light.

[ARCHIVED THREAD] - No barrel markings

AR-15 » Troubleshooting

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