MARCK 15-001 HYDRA Description
.223 Rem./5.56 NATO cal., AR-15 style, GIO, 16 in. barrel, A2 front sight base, M4 profile 6-pos. Mil-Spec stock, MGI modular lower receiver with AR magwell, MGI Quick Change Barrel upper receiver (QCB-D), MGI D-Fender D-Ring, MGI modified bolt carrier and firing pin, black or Muddy Girl (disc.) finish, includes hard-sided lockable pistol case.
Changing the barrel and bolt allows the firearm to accomodate other calibers including .300 AAC Blackout, .450 Thumber, 6.5 Grendel, .22 LR, or .50 Beowulf cal.