Remember hat this not about an AR15, but a dedicated .22 styled after the AR15.
Conversions for the AR15 are notoriously finicky, and that’s using good parts and ammo. While technically not a conversion, the similarities are there.
Many moons ago I ran a Colt conversion in an XM177 clone. Thanks to the slime bill it was a 10 round mag only, and back then spares were more than difficult to find. The Black Dog mags weren’t even a dream yet.
However to this day, I wish I had held onto that unit, temperamental and liking only premium ammo, it ran well when fed right. And was decently accurate.