View Full Version : Want To Build My 1st AR

03-06-2012, 11:30 AM
It seems the more I read, the more confused I become. The rifles I have now are all .30 cal (and one lonely 10/22). I see some lowers are marked multi-caliber. Does this mean that, depending on the upper, you could shoot .556, .762, 9mm, etc?

I'm sure I'll have many more questions but this seems like a good starting point. I just want to get going.

03-06-2012, 11:40 AM
You are 100% correct, If you have a mil-spec lower you can outfit it with a .300, a 5.56, a 6.8, 22, 50 cal beowulf...the possibilities are endless.