AR-15s

That'll do what you want for sure. I would order a couple mags on top. I run a Palmetto barrel on my AR pistol with zero issues so far.
It's done.
With the savings, my ammo and spare magazines ended up free.
Oddly, my Chase Freedom card wouldn't work. THen tried my Amazon Prime card with success. Reminded me how easy it would be to stop certain types of sales.