How on earth do you remove this kind of barrel nut?

[MILITATED]

Back with another noob question.
Up until now, I've only had experience with delta rings, which might I add, are not my favourite. Anyway, I've come across a new type and it looks much nicer, but I've got no idea how you get the bloody thing off!
Here is a picture of it: http://imgur.com/EHspJVl

Anyone had experience with this kind? Not sure how you'd actually go about unscrewing it. All the parts on my gun are put on very tightly and are a pain to get off for the first time, so I'd imagine this is no different. I'm removing my free float so I can take a look at my outer barrel (for an up coming project). Thanks in advance

[Dannn]

I don't suppose it's a left hand thread is it ?

[MILITATED]

No idea if I am honest. I'd assume I have to turn it clockwise like I did with the metal part around the barrel nut to release the hand guard itself, but I can't exactly get my hand around it to turn it or anything.

[Lozart]

No idea if I am honest. I'd assume I have to turn it clockwise like I did with the metal part around the barrel nut to release the hand guard itself, but I can't exactly get my hand around it to turn it or anything.

You'll need a wrench with pins that fits into that inner ring. And some elbow grease.

[TheFull9]

What sort of handguard was it mounting on the rifle before? You generally need that info to know which sort of barrel nut spanner you'll require.

 

It won't be a CCW thread on the upper receiver, nobody builds ARs that way that I've ever heard of (airsoft or RS).

[Hibernator]

One of these wrenchs! It's got pins that stick out and go into those holes. Mine had 3 pins, but I had to hacksaw one off because the third one didn't quite line up with a hole making it impossible to insert correctly. Probably just the usual "no standard spec" in airsoft tolerances

 

 

[MILITATED]

Ah yes, I saw one of these wrenches earlier. Guess it is going to be an unavoidable purchase Thanks for all the replies

[BigAl]

Standard AR15 Wrench.