Brownells BRN-601 Retro, 5.56mm cal. semi-auto rifle.   Serial #B6011084.  New unfired condition. Re-production of the early Vietnam era rifle!  20” barrel has mint bore, with pronged flash hider.   Upper/lower receivers have 100% matte gray finish.  Original “slick-side receiver without forward assist.  Original Small style charging handle.  Green stock, handguard and pistol grip.  In box with one 20 rd. magazine and re-print of the famous Army “comic book” maintenance manual.  An amazing piece of M16 history!