Are you saying that the Octane doesn't require suppressor sights?No comparison. 223 is loud as hell no matter what can it is shot through and subsonic 223 is just retarded. Requires a ton of work to the rifle and is basically expensive ass 22lr at that point. 9mm through a can is pretty quiet, especially shooting 147s. You can shoot any bullets you want through it. Just be careful if you want to shoot cast then get a can you can take apart like the swr octane cans. That's essentially the reason I went with the octane 45 so I could shoot cast bullets if I choose. The osprey is nice but it wont necessarily keep you from needing to get tall suppressor sights. Either can is very nice and next month Ill order the osprey 45 as well mainly because its just a cool ass looking can.