Are M4 feed ramps a must?

[NugginFutz]

Oops, I guess I should've gone to the link posted by Nugginfutz before I replied. The picture says it all and in a much better way than the words I cobbled together.

You were concise and on point, KTC. No apology needed. I just happened to remember that post, and how much those who contributed to it. It was a no-brainer, when deciding whether to reiterate or just link to that thread.