AR15 caliber conversion

[1bardan+]

I have an AR in 7.62x39 with a 16.5 "barrel. Aside from a barrel and bolt, what does it take to convert to 5.56 18-20" barrel?

[QuietM4]

A wrench.

[TheAccountant]

If you want something a little different, you could do a LBC/Grendel variant using that bolt too. Just make sure the barrel is configured for a Type 1 bolt.

[1bardan+]

Problem solved, it's SPF
Thanks