Seeing that .22, .223/5.56 ammo is in short supply, I searched around for an AR platform in .17 HMR. I found this:
Alexander Arms .17 HMR | Shooting Illustrated
I was wondering, is this even an effective round? Are there other rifles that would be a better choice?
This may be too late. Just did a check and you can't get this ammo either. Ugh.