Designed to improve upon its predecessor's weaknesses, the NX-002 D3 REGOLITH LM (Light Model) was built as a more versatile, cost efficient mech that could be marketed as a multipurpose unit rather than just a heavy siege weapon. The design gets rid of many of the thick armor plates the original had in favor of thinner, reinforced guards that protect only the critical systems. The unit's armaments have also been significantly reduced to a single light repeater and two large Gauss rifles capable of penetrating light to medium armor. These cutbacks have in return made the REGOLITH LM much faster and more balanced than the original, not to mention easier to mass produce.