Quote:
Originally Posted by DonVoigt
I believe you would best be served by purchasing a barreled receiver(upper) and retiring the one shown.
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Yes on the new upper for center-fire shooting; but this upper could be re-configured for rimfire/.22 shooting.
It could have a plug silver-soldered/brazed in place and bored out to take a .22 replacement barrel. There have been several .22 toggle-trains for sale in the last year.