Type of Castle nut on buffer

[M1XdColt]

[ar15barrels]

I have not seen a castle nut on a buffer.
I have seen castle nuts on buffer tubes though.
They are usually made of steel.

The answer is potatoe.

[M1XdColt]

I have not seen a castle nut on a buffer.
I have seen castle nuts on buffer tubes though.
They are usually made of steel.

The answer is potatoe.

I made some research and it's just an old version castle nut off the Colt xm177 model. It's just a round version without the castle style. Just an hybrid clone between the two model colt XM177 & 607

[ar15barrels]

I made some research and it's just an old version castle nut off the Colt xm177 model. It's just a round version without the castle style. Just an hybrid clone between the two model colt XM177 & 607

That's not a castle nut.
That's a spanner nut.