Why Benelli put a pistol grip stock with such a long LOP on the M4 I have no idea.....but I hate it and it's unusable for Wifey. Well, Mesa Tactical has finally come out with their Urbino stock. I came across one yesterday at a gun shop, brought it home and had it on in 5 min. What an improvement! It also has an adjustable cheek riser for optics and a Limbsaver butt pad (my shoulder is forever grateful
Here's a couple of pics showing the difference in length. Makes the M4 much better ergonomically.

 

Looks good

 

Loves me the Benelli's. If I shot more often, I'd get one of those badboys or a Mossy 930 SPX.

 

Hmm, never noticed an issue with the LOP on my stock. No extension tube for you?

 

The tube is on my to do list