Quote Originally Posted by Elhuero View Post
stupid question. so this is just a drop in thing, and you shoot the .22 out of the .223 barrel?
.223 is still a .22 bore barrel, so it's not that big a deal.

A true "22LR" barrel will actually have a nominal .221 bore, vs .224 in most centerfire barrels, but the slight difference in diameter does not affect the ability of the .22 bullet to engrave the rifling, and any high pressures encountered are easily handled by the more robust centerfire barrel construction.

It's available both as a drop-in for a .223/5.56 AR/M16 or as a dedicated upper or a dedicated complete rifle.

The dedicated uppers and rifles have true 22LR 1/16 barrels, and use a collar and true .22 chamber, as opposed to the .223 chamber adapter of the drop-in conversions. They're otherwise identical.