What is the difference between a dynamic ejector & fixed ejector?What are the pros and cons of each?

A dynamic ejector like the plunger type located on the bolt face is very effective and less prone to malfunction or damage. However, more parts to be manufactured during the build process and more to breakdown and clean. Fixed ejectors are usually one piece of metal located opposite of the ejection port that is fixed in place. This small metal bar can bend or break though and the firearm could begin to malfunction with every shot you take. A benefit to the fixed ejector could just be less moving part and more reliability depending on the make and model. Each serves a purpose, and both work great when properly maintained.