Help please: What size socket to remove supernova pistol grip stock?

[tasum]

As above can anyone tell me what size socket is required to remove the retaining bolt on a benelli supernova pistol grip stock?

 

I know I will need a deep socket, but I'm not sure whether it is a 13mm socket.

 

Stage 1 of the stock reduction project has been hampered by me only having short sockets

 

Thanks in advance.

[12508]

I used a deep socket extension with a 13mm socket to take my buddy's stock off.

[tasum]

Thanks 12508, have bought the 13mm, I'll be socketing this eve

[12508]

If I remember correctly, I didn't remove the stock all of the way.

I just loosened the bolt far enough to rotate the stock 90 degrees out of the

way so that the trigger guard could be pulled free.