Check the listing for details. MagnetoSpeed V3 Barrel-Mounted Ballistics Chronograph In Hard Case MS-V3. Condition: New. Listed at 309.00 USD. BRAND NEW SEALED RETAIL PACKAGE MagnetoSpeed V3 Barrel-Mounted Ballistics Chronograph In Hard Case MS-V3 The MagnetoSpeed V3 ballistic chronograph kit was designed to be used on barrels and suppressors from 1/2 inch all the way up to 2 inches in diameter. In addition to the larger diameter tolerance, the V3 also has one inch more clearance in the blast zone to account for longer (up to 3" in most cases) muzzle brakes, flash hiders, etc.Improved Display, three-button menu systemEasy access battery compartment, no need for screwdriver to swap batteriesImproved shooting modes, with the ability to now operate with air gunsAdvanced data logging and troubleshooting capabilitiesMore compact and rugged display housingRapid mode with rate-of-fireRugged strapping systemwith metal buckle and triad thumb nutDual data connection pointsIncludes: Display Unit, Retractable cable, blast shield, rubber V-block spacers, microSD card, spacer kit, Hard case w/cut foam and Alignment rod The MagnetoSpeed V3 Chronograph Kit is a barrel-mounted ballistics chronograph that comes in a hard case. It is manufactured by Magnetospeed and has a model number of MS-V3. The kit does not include any custom bundles. It is designed for use in range and shooting equipment, hunting, and sporting goods.