.223 Wylde (disc.), 6.5 Creedmoor, .260 Rem., or .308 Win. cal., integrated ambi bolt release, 18 1/2 in. stainless steel match grade barrel with light, medium, heavy contour, or Proof Research carbon fiber, hinged dust cover over ejection port, SST, A2 fixed or 6-pos. collapsible AR stock, AR style grip, ambi safety, free float tube, non-reciprocating folding charge handle, billet upper and lower receivers, hard anodized black finish.