The Rival Arms RA20P401A Precision Drop-In Barrel for the Sig P320 Full Size is engineered to elevate accuracy with a match-grade 9mm Luger barrel that features a 3.90" length, 1:10 twist and 6-groove rifling, all CNC-machined from 4340H steel billet to deliver superior durability and corrosion resistance. Its PVD coating creates a robust wear barrier, while the target crowned muzzle optimizes shot-to-shot consistency and reduces muzzle rise, making it a reliable choice for precision shooting, training sessions, and competition use. Designed for straightforward, drop-in installation with no gunsmith required, this barrel is threaded with 1/2-28 threads to accommodate popular suppressors and compensators, expanding its versatility for varied shooting environments. Each unit is individually hand inspected to ensure consistent performance and reliability, and Rival Arms backs the precision with a limited lifetime warranty for long-term confidence. Integrating premium coatings and high-grade steel with meticulous craftsmanship, this drop-in barrel is an ideal upgrade for shooters seeking enhanced accuracy, repeatable grouping, and a durable, maintenance-friendly platform on the Sig P320 Full Size without compromising reliability.