The Sig Sauer MCX Virtus represents the second generation of the MCX platform, focusing on enhanced durability and performance. Key upgrades include a tapered lug bolt and an O-ring extractor designed to achieve a 20,000-round service life with zero part replacement. The Virtus also features a new Matchlight Duo two-stage trigger, offering a crisp 2-pound pickup and 2-pound pull for improved precision. While upper and lower receivers are cross-compatible between Gen 1 and Gen 2, the tapered lug bolt is a significant internal upgrade for longevity.
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