View Full Version : ar lower and upper

08-13-2010, 9:19 PM
im trying to build an ar but not sure what size caliber i want to go with, im planning on building the lower receiver first but before i start i was wondering building the lower of an ar15 all the same? i mean can i build the lower and decide to go with the 223 setup then later change my mind and go with the 7.62? is the lower internal all the same? thanks yo

08-14-2010, 12:42 AM
Wrong section to ask for help.