AR-15/M-16 XS® Upgrade: Big Dot® Xpress Threat Interdiction™ Sights

Mar 27, 2014 No Comments by

March 2014 – Fort Worth, TX – First introduced in 2012, XS® Sight Systems has extended the Xpress Threat Interdiction™ (XTI™) product line to include Big Dot® Tritium Express and 24/7 Tritium® Angle Mount Back-Up Iron Sight upgrades for your AR-15/M-16. Designed for firearms equipped with handguard mounted top picatinny rail systems, this low-profile night […]


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