MARCK 15-003 HYDRA
.223 Rem./5.56 NATO, .300 AAC Blackout, 6.5 Grendel (new 2015), 6.8 SPC (new 2015), .450 Thumper (new 2015), .25-45 Sharps (new 2016), or .458 SOCOM (new 2018) cal., GIO, 16 in. barrel with low profile gas block, M4 profile Mil-Spec stock, ...