MDX:508/MDX:510
7.62x39, 5.56 NATO, or .300 AAC Blackout cal., GIO, 8.5 or 10.3 in. barrel, adj. gas block, HATEBRAKE muzzle booster, 30 shot mag., billet receivers, ALG defense combat trigger, SCW or CQB brace, M-RAX and M-SLOT (M-LOK) compatible handguar...