Dan Wesson Bruin, Semi-automatic, 1911, Full Size, 10MM, 6.03 Barrel, Matte Duty Finish, Black, G10 Grips, Thumb Safety, Fiber Optic Night Sights, Optic Ready, 8 Rounds, 2 Magazines 01793 They took note of the growing demand for 10mm handguns, and responded with the Bruin. The first long-slide 1911 from Dan Wesson, the Bruin Optic-Ready comes with a 6-inch barrel, which allows full-power 10mm loads as much time as possible to use their powder charge.