This rifle I built 10 years ago has two spring ball detent things from MSC in it. I drilled and tapped through the bottom of the receiver to push up on the bolt.
I had to grind a ramp on the bottom lug to get it started going over the ball.
The word 'forum" does not mean "not criticizing books."
"Ad hominem fallacy" is not the same as point by point criticism of books. If you bought the book, and believe it all, it may FEEL like an ad hominem attack, but you might strive to accept other points of view may exist.
Are we a nation of competing ideas, or a nation of forced conformity of thought?