I did some more testing because that’s what I like to do (sure would be easier with FORGE), and I was curious exactly what you can place on a Razorback for transport. I made a video of my findings if you’re interested in that sort of thing, it’s on my Halo specific YT channel if you search the title of the thread.
Basically, long story short if you don’t want to see it in action, these are the things you can place on the back of a Razorback:
All power weapons, including the detached HMG turret, so
Sniper Rifle
Gravity Hammer
Cinder Shot
Energy Sword
SPNKr Rockets
Skewer
HMG Turret (I guess that confirms it as a power weapon)
In addition to that, you can also attach any type of Fusion Coil, two at a time in fact.
And all objectives can be placed on the back as well, so
Enemy flags
The oddball
Power seeds
No equipment or other items can be placed on it as far as I was able to test.
Not super handy information for most people, but I just like to know these things personally. Thank you.