Complex sentence: IC comes standard with a Magpul MOE pistol grip, and either a Magpul stock or a proprietary compact stock the M6-IC was not down selected as part of the competition.
Split into simpler sentences: IC comes standard with a Magpul MOE pistol grip, and either a Magpul stock or a proprietary compact stock. The M6-IC was not down selected as part of the competition.