5.56 NATO, 6mm ARC, or 6.5 Grendel cal., DI, 16.1 or 18 in. medium weight contour barrel, threaded muzzle, mid-length gas tube, M4 feed ramps, LaRue MBT trigger, LaRue Rat stock, billet match grade receivers with hard anodized FDE finish, full floating upper handguard with M-LOK, includes high impact polymer case. New 2022.
5.56 NATO cal., GIO, 16.1 in. barrel, SureFire muzzle brake, FDE KG GunKote finish, "COSTA LUDUS" logo engraved on left side of receiver, black parts and rail covers, first 500 units are match numbered on the upper and lower. Mfg. 2013-2015.
7.62 NATO cal., AR-15 style, GIO w/PST (Port Selector Technology), 16 in. heavy barrel, LaRue M308 TranQuilo muzzle brake, 1/10 twist, three 20 round mags., FDE Cerakote finish w/select black parts and GAP rail covers. Approx. 125 mfg. Disc.
5.56 NATO (new 2011) or .308 Win./7.62 NATO cal., AR-15 style, GIO, 16.1, 18, or 20 in. barrel, A2 flash hider or TranQuilo muzzle device (new 2020), 20 shot box mag., flared magwell, Troy front and optional BUIS rear sight, A2 fixed (20 in. barrel only) or Retract Action Trigger (R.A.T.) stock, A-PEG grip, adj. gas block, detachable side rails, Mil-Std 1913 one-piece upper rail, black anodized finish, approx. 10 lbs.