Cal. 223 Rem. S# MH059287. Pre-ban (below S# MH086020 of 1994) Model 6601 (same as 6600 but w/ Colt voluntary bayonet lug removal) mfg. post 1991 w/ 20" bbl. Marked "C MP 5.56 NATO 1/7 HBAR" having A2 style birdcage flash hider. Carry handle forward assist upper w/ A2 sight; standard front sight w/out bayonet lug. Lower has blind pinned block in trigger area to assure semi-auto parts only; bolt carrier fully slotted to rear. Standard buttstock, finger notched grip & rnd. ventilated handguards. MAGS: 2 near excellent 20 rd. mags. UNATTACHED ACCESSORIES: original black nylon sling & owners manual. CONDITION: all aspects near excellent. (17-3897/NW). MODERN. $1,000-1,500.