[ARCHIVED THREAD] - building dedicated 22lr upper

Posted: 12/15/2011 2:59:20 PM EDT

so I'm researching building a dedicated 22lr upper and I'm a bit confused. i found a barrel with chamber adapter on midway for $100 22lr barrel. I have planned to put a cheaper free float on this build so that would come with a barrel nut. only thing left to do now is get an upper receiver of my choice to put the barrel into (duh).

now is where i'm confused. do I just purchase a cmmg conversion and then I'm done? what is the barrel adapter for if the conversion kit already has a chamber adapter to fit into a 223/556 chamber?

If anyone could clarify I would appreciate it.

Posted: 12/15/2011 3:01:08 PM EDT

[#1]

A dedicated upper uses a barrel collar attached to the rail that snaps on the barrel.
A conversion uses a chamber adapter for 5.56 chamber.
Dave N

Posted: 12/15/2011 3:05:47 PM EDT

[#2]

ok, but that didnt' answer my question.

I have a 22lr barrel, a standard upper receiver, free float handguard setup. what do I need to buy to finish? is the chamber adapter from a 22 conversion need to be removed?

Posted: 12/15/2011 3:11:39 PM EDT

[#3]

If you bought the CMMG barrel with collar, you need to buy a conversion kit. Take the adapter off the rail and replace it with the collar.

CMMG does not sell the bolt/rail without any collar or adapter.
If you buy the conversion for a 5.56, you will have the parts to use it as a dedicated bolt or a conversion by switching the adapter/collar out.
Dave N

Posted: 12/15/2011 3:14:30 PM EDT

[#4]

oooooooh I get it now! thats perfect. I'll buy the conversion and then just keep saving to buy more parts for a dedicated upper! thanks!

Posted: 12/15/2011 4:47:32 PM EDT

[#5]

It's a lot simpler than you think. I went the same route and it's a blast.

[ARCHIVED THREAD] - building dedicated 22lr upper

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[ARCHIVED THREAD] - building dedicated 22lr upper

[ARCHIVED THREAD] - building dedicated 22lr upper