So I have a couple ARs, all in 5.56 and want to explore other calibers in the platform.

I absolutely want an off-the-shelf complete upper, not in to custom at this point.

I have a .30 caliber suppressor so want a suppressor friendly round of .30 or less.

Brass or ammo should be semi-available. Not interested in a bunch of fire forming or creating oddball cartridges.

AR (5.56) magazines would be a plus.

Should be suitable for home defense and medium game. Mostly within 100m, but 200-250m would be nice.

I know there are a lot of rounds released over the last ten years and I haven't really been paying attention but wonder what the gurus here recommend.

TIA

Last edited by Redleg172; 09/16/21.