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Posted: 7/7/2017 2:51:51 PM EDT
| Anyone know the mil spec angle for the M16 chamber chamfer? |
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If I remember correctly it is 23 degrees
Just do a google search for 5.56 chamber angle, you will find what you need. ETA, I just went ahead and did it for you. Attached File |
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I thought I would have this dimension in my PDF files, or pic files, but I don't. I thought it would then be a 15 second google search then, too.
I've gotten away with a flat faced barrel with about a 1/16" or less polished radius into the chamber without a failure to feed due to not having this chamfer in several AR barrels. I've left the barrel entrance at a sharp 90 before and had it dig into cartridge shoulders, but even a slight radius took care of that problem. |
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Quoted:
Yeah, it doesn't have to be a whole lot. I've seen some barrels where it's massively over cut, and causes the web of the case to bulge. |
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