Hello, There are some good posts on here bout how to put a wood stock on a synthetic Gamo rifle. As I was very interested myself> I have learned a few things not mentioned on the post's. When installing a Hunter 440 beech stock on other Gamo's it is a drop in mod, however there are just a few simple things extra that you can very cheaply get from Gamo, by phone only, that will make it a true precision mod. First obviously the Hunter 440 stock is the one ya need,price $37.78 and you will need trigger guards as the syn stock's guard is made into the stock,the wood's screw on seperate piece. Trigger guards are $6.96 for a two pack,free S&H. Those items are on the Gamo USA site. What you will need to order by phone are, the reciever end cap,$3.95 free S&H and the linkage roller $5.95 Free S&H. The end cap is not a safety issue as co airgunner had posted,but it sure does have aesthetic value. You will have a big gap where reciever and stock meet. But as feared don't have any purpose in holding the spring block pin in reciever,Charliedatuna explained that very well on that thread. The linkage roller is different from wood guns to syn, Most people who have done this say remove the washer from behind the existing roller and works fine. Gene told me they are different as did a Gamo tech and that binding even though almost unnoticeable will occur during cocking so if ya gonna do this spend $5 more and do it right. I am sure if ya had the time and means you could fabricate custom guard's and end cap pretty easy as did co airgunner, but it's so cheap to get the OEM part's I went that way. I do plan on using one of the two trigger guards as a template to make a custom guard out of steel so I can put some real nice bluing on it. Well I know that this is a old subject but for people starting this project I think this sums up all the things you would have to search for as I did, and will help you do it correctly and safely. I really wish some custom stock maker would get a Gamo stock and use as a pattern to make some truly custom stock's at a price range that is realistic for a airgun. I know easier said than done,would have to be done by CNC. AKJC1977