Criterion 13.9” .223 Wylde, Mid-Length gas, Hybrid contour, 1-8 twist, chrome-lined barrel. Mostly sat in a safe, less than 200 rounds through it.

For manufacturer’s specs: https://criterionbarrels.com/products/ar-15/223-5-56/hybrid/ar-15-hybrid-mid-gas-barrel-chrome-lined/?v=7516fd43adaa