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Converting my AR-15 (M4) .223 into an AR-10 (.308) help

4.6K views 26 replies 8 participants last post by  SONYtec  
#1 ·
Alright fellas I am going to need your help with this, I have been thinking about this forever and am still confused.

I own a colt LE6940 M4 which is a .223 rifle. What I want to understand is how a person is able to take an AR-15 and convert it into a different caliber. I want to take my Colt and be able to swap between a .223 caliber and a .308 caliber. So how do I do that?

I understand that I have my Colt upper and its lower, what I am curious is can I buy just a new upper and keep the lower intact without any modification(s)? or does the lower have to be modified too?

I wish I could elaborate more but I am sure once we get talking about it a lot of the details will be fleshed out. :?
 
#27 ·
Thanks!! :?