Barrel nut tool compatibility?

[Mr Mistoffelees]

I just started a new build and came across an interesting problem.  My new barrel nut wrench doesn't fit my barrel nut!

I purchased the following 2 items in hopes that I could torque on a compatible nut to install a Troy MRF-308 on a new JD machine upper.  Apparently I was incorrect.  If the PRI wrench that's apparently designed for DPMS/KAC platforms doesn't fit, what does?  Or is it my barrel nut that's the issue?  Either way I'm stumped and I'm hoping there's a more clear answer out there! :)

PRECISION REFLEX, INC. - DPMS/KAC 308 Barrel Nut Torque Wrench

http://www.brownells.com/gunsmith-tools-supplies/rifle-tools/wrenches/dpms-kac-308-barrel-nut-torque-wrench-prod54765.aspx?psize=96

DPMS FIREARMS LLC - .308AR BARREL NUT

http://www.brownells.com/rifle-parts/barrel-parts/rifle-barrel-hardware/barrel-nuts/308ar-barrel-nut-prod44324.aspx?psize=96

- Mr. M

[98Z5V]

to install a Troy MRF-308 on a new JD machine upper. 

There's two wrench flats on the MRF-308 barrel nut.  You can put it on with a large crescent wrench if you choose.  No special tool needed.  <thumbsup>

[Mr Mistoffelees]

Waaaait a minute you mean the Troy MRF-308 includes a barrel nut? (I don't have my MRF yet as its still in transit) Though I was under the impression that it utilized the stock DPMS barrel nut to install.  This makes life a whole lot easier!  The only disadvantage I suppose is that I can't torque it to spec with my wrench.  Did you just crank it on with an length of pipe extended on the crescent wrench handle for more leverage?

[98Z5V]

If you ordered the MRF-308 for a DPMS, and paid extra for the barrel nut, you'll get it.  You can only use that barrel nut.  Better check what you ordered.

The MRF-308 will directly fit the stock AR-10 barrel nut.  Troy makes a AR-10-sized barrel nut with DPMS threads, for the DPMS upper receivers.

You don't need a length of pipe to put it on.  30~80lb/ft is the standard, and 30 ain't much - just put it on tight.  If you have to grunt the thing on there, that's overkill.

You'll get instructions with your rail.  That explains everything clearly.

[Mr Mistoffelees]

I ordered SKU (SRAI-308-C3FT-00) for the DPMS high profile upper receiver.  So I assume it's included...I wish I had known that prior to dropping $60 on parts...Whoops.  Thanks for the quick info!

[98Z5V]

Better call Troy Ind, and see if they've changed it.  I put mine on in early 2010.

[William Margowski]

I installed a quad rail on my panther arms DPMS AR-10 and need to torque the barrel nut now but can’t find any tool to fit the nut  mine has a regular style nut it doesn’t have a place for a regular AR wrench to go in to looks like you would have to use a regular style wrench end with a place to put a torque wrench into anyone know where I might get one of these ??? 

[Rsquared]

Sounds like you mean a crowfoot wrench. You can get them from a whole bunch of places.