I can finally say I am a proud owner of an M4 (11707). I've been wanting this weapon for some time and just got around to buying it this week. I want to thank you guys for all the knowledge posted on this forum that helped me decide exactly what I wanted. It's my second Benelli (1st supernova) and couldn't be any happier. There are obviously some modifications I want to do to it. That being said, I've seen the c-stock on ebay being sold by a company called AltaTac. Has anybody dealt with them and have any feedback? They have some good reviews and the stock seems authentic form the pics they have.