Ended up getting the Faxon light weight BCG from CTCS, as well as the 11.5 mid-length gas Faxon Gunner barrel. Finding a 10.5 pencil barrel in Canada proved to be next to impossible. The gas port on the 11.5 is slightly oversized to account for the shorter dwell time of the mid gas system so should have a good tuning range with the adjustable block to test with different buffer combinations. I will probably have to tune for smaller ranges of different ammunition but for the purposes of this build it shouldn’t be an issue.