5.56/16" barrel. 30-round magazines, 6.7 lbs. Adds FN’s Rail System to previous generation, enhanced MIL-SPEC lower receiver, match-grade free floating, chrome-lined, barrel with 3-prong flash hider found on the FN SCAR rifles. Mid-length gas system, H1 buffer, Magpul grip, buttstock and M-LOK accessory mounting system.