The EWK Dan Wesson small frame hex wrench offers some great features! First, it comes with a .357 caliber pilot, and can be used in conjunction with any 1/2" socket tool such as a torque wrench. Secondly, the best feature is if you have a stuck barrel nut...just remove the pilot, and use in conjunction with a piece of 5/16" all thread, nuts, and washers to get that stuck nut out.
This wrench is not recommended for general use, the wrench with the handle is a better choice. The key to any of the wrenches working well is to apply down pressure (like a screw driver) to keep it engaged with the nut. Of course its possible with this one, but harder to do.
Please visit the products webpage link below for a picture of the wrench in use.
Also visit the following link for more information on removing stuck barrel nuts -http://www.danwessonforum.com/faqs/