I agree with leaving the Inland 5-44 barrel. Unless it is an all original in original condition, I think the arsenal rebuild with upgrades is more authentic and the pinnacle of carbine development. It is the most recent "as issued" condition of the weapon. I know lots of folks want a "Saving Private Ryan" early carbine, but my CMPicon Inland with upgrades could have been on Okinawa, Pork Chop Hill, or in the I Drang with an advisor in 1962. What's not to like?????