Originally Posted by WannaBeVagabomd
I guess my my little day dream will take a bit longer. My bad, it was an aluminum receiver. What parts are useable would you say?
The buttstock, and most
of the FCG. Maybe the handguards. I think you should leave everything else with the .22LR. Seriously, you should get a separate AR if you want to shoot rifle rounds. Every .22LR AR I have seen is built exclusively for .22LR, however, you may be able to use the .22LR upper on an AR built for .223, if the mag will work.