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AR cam slot
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  godsownrifle

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Posted: January 12 2016 at 5:35pm | IP Logged Quote godsownrifle

How would you cut the cam slot in an AR 15 or AR 18 bolt carrier in a home workshop with only a small manual milling machine or even less tooling ?

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  justin22885

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Posted: January 13 2016 at 3:14am | IP Logged Quote justin22885

youd make two oblong holes, one on top, one offset 22.5 degrees and further rearward, then blend the closest surfaces of the two together.. might be able to do it with a drill press and hand files if youre careful, have the time on your hands and know what youre making
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  Mongo

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Posted: January 13 2016 at 8:40am | IP Logged Quote Mongo

The original drawings for the bolt carrier have advance and angle for doing the cam path on them. I can't upload them here since the server is not taking attachments or I would post them.

BTW the cam path does go straight for a bit before it starts its unlocking. This is for dwell time to allow the pressure in the chamber to drop.
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  justin22885

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Posted: January 13 2016 at 10:22am | IP Logged Quote justin22885

theres also a small bit of extra travel after it unlocks too, the whole cam groove looks like a lightning bolt shape or a stretched out Z thats been wrapped around the carrier.... i suggest going to grabcad website and getting yourself a 3D model of the bolt with a free viewer (like the edrawings viewer) and you can get the measurements and angles yourself
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  DaveyG

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Posted: June 11 2016 at 12:36pm | IP Logged Quote DaveyG

If you've got a small milling machine it'd be easy, just mill a short slot at 12:00, rotate 22* (about 11:15) and mill the small slot (both of which are longitudinal but the front of the 11:15 stops aft of the rear of the 12:00) then situate the vice or dividing head at an angle to the mill table travel, and mill a slot to connect the two previously made slots.
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