Works well - Magnetospeed Sporter Barrel Mounted Ballistic Chronograph

It can be tricky setting this up on tapered barrels and barrels with limited real estate due to an extended handguard. However, once set up it stays put and records everything that flies past it. The features of the V3 are nice, but at that point you might as well commit to the LabRadar. This works well, is simple to use, easy to pack in a range bag, and well worth it, especially if setting up a traditional style is difficult or prohibited at your range.