I have the RRA LAR-8. I just ordered/received the RRA free float tube type hand guard for it. The instructions provided appears to be for their other hand guards...the tube type is very different. The instructions say I have to remove the barrel nut and install the provided one. I did not receive a new barrel nut with my new tube. But, it appears the barrel nut may be actually part of the tube...built in so to speak. Is that how it works with this hand guard? How do you torque this down...strap wrench? This is my first attempt at modifications on a AR-10 style rifle so I'd like to be sure before I just start tearing into things. Appreciate any help.

Yes...the aluminum tubes are the older-style single piece units, with integral barrel nut.
You would normally use a 2.5+ inch nylon strap wrench to install it.
Give ua a scream (866-980-7625) if you have any issues installing it and we can walk you through it.
Thanks.
Steve/RRA

Okay then....let me make sure I have this straight.  I have to remove the original barrel nut.. is there a jam nut?  Leave it on or take it off?  Will an Armalite barrel nut wrench work?  If not, what can I use to get it off?  Then put the new handguard with integrated barrel nut on and then torque? Did I miss anything.  I appreciate the help.

Yes.  You'll pretty much strip the upper forward of the receiver, to reassemble with the aluminum tube replacing the original barrel nut, delta ring kit, handguard, handguard cap, etc...
We sell a specific wrench head for barrel nut removal (308A0162).  I don't know that the Armalite wrench will work or not.
The strap wrench is for installation of the aluminum tubular handguard.
Thanks.
Steve/RRA

Steve,  I'm back again.

The Armalite barrel nut wrench WILL NOT work.  I've been e-mailing Amy about getting the correct wrench, and bless her heart I know she's really trying, but I don't think she and I have a meeting of the minds...I'm probably not being clear enough.  She's telling me I need the RRA wrench P/N AR0162...different from what you indicated.

Just as a refresher I have the LAR-8 standard in .308.  I want to get the plastic hand guard and barrel nut off so I can install the aluminum free float tube with integral barrel nut.  

What wrench do I need and how do I get it?  Thanks.

                     REX

The 308A0162 is typically for the LAR-8 platform/sized components, while AR0162 is typically for LAR-15 platform/sized components.
To get your current parts off, you'll need to use the 308A0162.  To install the aluminum tube, you'll need to use a 2.5" or wider nylon strap wrench.
Steve

Got it!  Many thanks.