The LRM 10 is the second lightest of the Long Range Missile family. Its relatively low weight and convenient size has seen it as the secondary armament on many 'Mechs. All LRMs have a minimum range where their warheads have less time to arm after firing. An LRM's minimum range is 180m, below which the damage decreases to nearly nothing at point blank range.
Artemis
The Artemis IV FCS upgrade increases the tracking strength and decreases the lock down time by 50%. However, each launcher requires an extra critical space for the Artemis control system. Additionally, ammunition costs double.