Help from someone with an AR15 bolt and a pair of dial calipers...

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N.W.

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Sep 19, 2005
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If anyone here has both of these items handy, I could use some help.

If someone could give me the following measurements, to the thousandth (or as close as you can get it), I'd appreciate it...

The height, width, and length of the locking lugs.

The diameter and depth of the depression on the bolt face where the base of the cartridge sits.

Diameter of the body behind the locking lugs.

Diameter of the firing pin hole in the bolt face.

Daimeter of hole for bolt cam.

Diameter of ejector.

Diameter of ejector retaining pin hole.

Daimeter of extractor retaining pin hole.

Width of slot for extractor.

I was having a hard time describing what I needed for the last two measurements, so I attached a rough drawing.


If anyone can help me with any of these it'd be greatly appreciated.

Thanks.
 

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