View Full Version : 16" carbine to 20" barrel how?

02-23-2011, 10:27 PM
I have a complete 16" carbine upper but I want a 20" barrel. Can I just add the new barrel on there or do I need other parts?

02-23-2011, 10:35 PM
you will need a new gas tube for the rifle length gas system, and a new hand guard.

02-23-2011, 11:01 PM
I would put a new bolt in it also.

Then you will notice your old 16" barrel sitting around and a new rifle will get built around it.

02-24-2011, 5:50 AM
you will have to get a few parts. if you have pics of your rifle it will be much easier to tell you what you need to get. do you have a drop in handguard? free floating? things like that.
you would be better off just building a complete upper and you can just change it up whenever!