I was just reading on another forum that someone was having issues with their new Ruger AR pistol.
It was jamming or stovepipng, a failure to feed, but he said it only happened every other round or so.
He finally figured out that it was only jamming on one side of the feed ramps.
Every time it would try to feed from the left ramp, it would jam.
He sent it back to Ruger.
They returned it stating that they had replaced the carrier.
I don't understand how a carrier would causwe this issue.
No first hand experience with the Ruger AR pistols.
556 models are $560.00 at Grabagun. https://grabagun.com/ruger-8570-ar-556-semi-auto-pistol.html