Calibers: 6.5 Creedmoor. Barrels: 20 in. Similar configuration to XLR-18 rifles. Xanthos Lite XLR-20 weight, 6.85 lbs. Barrel is 2A contour lightweight profile, 4150 barrel steel with QPQ Nitride, black oxide extension, rifle-length gas system, 6.5mm Creedmoor SAAMI Chamber, 1:8 twist.