Range Finder, Rapier Ballistic Rangefinder MTC Optics announce a small laser-rangefinder with a big difference. The new MTC RAPIER BALLISTIC will accurately measure ranges out to 1,000 metres with an accuracy of + or – 1 metre, and yet is contained in a tiny package that contains a Bluetooth® module capable of connection to an external smartphone. With this feature enabled the MTC ballistic app can be used to instantly calculate points of impacts, hold-over, even windage!