[IMtheNRA]

In this now famous video of the Xtrema 2 demonstration, the shooter fires 12 rounds in 1.73 seconds.

http://video.google.com/videoplay?docid=-6750458630308006678

If the magazine holds four 2.75" inch rounds, and there is a round in the chamber, that means the mag extension added 7 more rounds. The longest extension I'm aware of is this +6"

http://surecycle.com/default.asp?page_id=3&parent_id=0&AddCategoryId=30


Does anyone know who makes a 7 round extension for the Xtrema 2 used in the video?

[220_Swift]

These are marked for the Extrema, I don't know if it fits the Extrema2 or not.

7 round extension
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=886365&t=11082005

8 round extension
http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=744549&t=11082005

[Smitty in CT]

Choate Machine & Tool makes these:

http://www.riflestock.com/catalog_page_detail.cfm?recordno=2&Product_CatalogID=2799&ProductNumber=15%2D04%2D03&ProductCode=27&ProductSubCodeID=177&NewProduct=0

The owner, Fred, will make them to whatever length that you want, of course, it will cost a little more but not much....According to Fred, he made the one in the videos....

[IMtheNRA]

Wow, that is great information. Thanks to both of you for such quick, informative replies!