All of Odin's handguards are essentially the same other than M-lok vs Keymod, picatinny in locations and the preference of machining detail. I have one of their older 15.5" handguards with screw holes for picatinny segments and no M-lok or Keymod that is now discontinued. I really like it. Ya just install the barrel nut, there's a bit of indexing and simply slide on the handguard (screw it down).
In my instance I could not get my barrel nut to index properly. To solve this issue I bought a lapping tool. I lapped the upper receiver and then it allowed the barrel nut to index. Others may have used shims, but I don't regret purchasing the lapping tool. I have since lapped every one of my other ARs.