In case you guys haven't heard yet, Lloyd Sikes (of Crosman Rogue fame) has been working on a dual tube conversion for the Discovery.... It has a second tube under the first and doubles the air capacity with the addition of 1 lb. of weight.... That means the gun, without scope, is about 6.2 lbs.... Here is Lloyd's website, looks like he is set for a Spring 2012 launch....

http://www.airgunlab.com/

The conversion looks pretty simple, the only difficult bit would be routing out a deeper channel in the stock.... but I think he plans to offer that service.... Lloyd is looking for "Beta Testers" for the initial batch, with kits to be supplied at cost.... so if you are itching for a new project, you can sign up on the website.... I have!....

Bob