AR-15 commercial buffer tube??

[Keeperfaith]

I have an Olympic Amrs AR-15 with a commercial buffer tube. I had attempted to take off the castle nut to replace the plate and add a plate that has sling loops on it.

The AR wrench I have couldn't fit around the castle nut.

Is there a specific AR wrench that will fit my commercial castle nut?

Thanks

Steve

PS: the pic is the tool i have, I also have the fancy AR wrench that can fasten down a barrel (free float or non free float) BUT i let my buddy borrow that. LMK if that "fancy" one will work with my commercial castle nut...

 

[ApacheCoTodd]

Do you have one of the "castle nuts" that aren't really castle nuts but rather threaded lock rings that are tightened by a spanner engaging a single round hole on the rings outside diameter - or - is it actually a castle style nut that perhaps is OK but the tool is outa spec?

 

[Keeperfaith]

My castle nut is an actual castle nut. I've only seen the ones you spoke of today while looking for a "commercial style" AR tool/wrench online.

The AR wrench I lent out has the single notch for turning the nut...

Thanks
Steve