Do I need to look for a .22lr specific muzzle device/flash hider? Or can I use any AR-15 device? (i.e. 556 size)
I saw a post where someone put a VG6 gamma on their 15-22 and that doesn't come in .22lr as far as I know... so I'm assuming he used a regular AR-15 size.
If you are an idiot like myself, you can even buy a brake/compensator that is intended for .22 pistol threads and put that on, if you are willing to endure the stress of getting it to time correctly. I wouldn't suggest it though seeing the plethora of brakes available, you are only really limited to 1/2 x 28 and budget.