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NFACurious · February 26, 2006, 05:56 PM

Ok. First of all, whats the difference between an m16 and an ar-15 besides the FA part.

Second, if i buy an m16 registered for .223/5.56 nato, and i buy an upper that changes the calibers, can i not use it because its registered for that caliber? can i re-register it for other calibers?

Third. Again if i buy another upper with a barrel legnth under 16 inches (ie SBR). Do i have to do another from 4 or form 1 whichever and go through the process again??

I havent found an m-16 yet or ever aquired the forms. This is stuff i want to know before i go down the road.

Thanks in advance.

February 26, 2006, 05:56 PM	#1
NFACurious Member Join Date: December 29, 2004 Posts: 77	My First FA. Questions before i buy. Ok. First of all, whats the difference between an m16 and an ar-15 besides the FA part. Second, if i buy an m16 registered for .223/5.56 nato, and i buy an upper that changes the calibers, can i not use it because its registered for that caliber? can i re-register it for other calibers? Third. Again if i buy another upper with a barrel legnth under 16 inches (ie SBR). Do i have to do another from 4 or form 1 whichever and go through the process again?? I havent found an m-16 yet or ever aquired the forms. This is stuff i want to know before i go down the road. Thanks in advance.