So on the way I have an AAC Prodigy and an AAC 762 SDN-6. First off I intend to mount the Prodigy on my SW M&P15-22 Does the Birdcage just screw off and on goes the prodigy? Next, I purchased the 762 with intentions to mount it on multiple rifles. Currently I intend to put it on my Remington R15, which has a fluted barrel with a recessed crown and I would like to know what kind of threading I need. I also have a WASR10 Romanian AK. After a little research, I decided it would be a good idea to rethread the factory threads. I read several accounts of the bullet hitting the can due to poor threading. I ordered this flash hider. For those not willing to click it, it is a 7.62 Blackout flash hider. I figured I'd get my AR threaded for that hider, then the AK rethreaded for it. Is it ok to use a 7.62 flash hider on a smaller caliber? Thanks for reading gentlemen I really appreciate it.