Definitely all adds up! Fortunately, I'm used to carrying around an extra 4" more than most, been doing it my whole life.
Most of the use of the rifle will be from a Deadshot Chairpod (groundhogs), bipod on the ground & bench. If SHTF & I had to be mobile, I'd probably be grabbing the lighter & more maneuverable Tavor T7 or 5.56. Although, the AR10T would be very mobile if I were to rig it up on @Belt Fed's Hoveround 😁