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What caliber upper?
So, thanks to a very generous member here I recieved the parts I needed to complete my stripped lower into a complete lower. Now I'm on he fence on what caliber to get/build the upper. I was origionally thinking .556 but now after chatting with my gunsmith friend that has a 16" 300 blackout barrel he will sell me for $50. I do like the possibility of "tinkering" with a 300 to find a load. A 556 it's load and go, and pretty straight forward. What say you gents, and lady.
Aim higher, or get a bigger gun.