Thank you, SharpsNitro. I shall check on the 458 SOCOM as well. I was also told that the SOCOM round fits into conventional 223 magazines but that the Bushmaster needs a dedicated magazine? Not sure if this is true or not. I have never owned an AR of any kind and this is going to be a fun learning experience.

Thank you for the advice and I shall post here as the project progresses.

Good hunting!