[ARCHIVED THREAD] - Random Technical Question

Posted: 4/12/2014 6:34:01 PM EDT

What is this recess for? What does it do? I know, very random but small details in engineering fascinate me.

Posted: 4/12/2014 6:36:07 PM EDT

[#1]

Thats the area where the bolt pin rotates thru, inside in the receiver.

This part..

Posted: 4/12/2014 6:43:04 PM EDT

[#2]

It all makes sense now haha. Thanks a lot man, I appreciate it. I spent forever trying to google wtf that was for.

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