Brownells BRN-605 Carbine GRINNELL, Iowa –-(Ammoland.com)- Brownells has launched its next Retro Rifle, the BRN-605, a close copy of the very first attempt to turn 5.56 AR-15-style rifles into carbines. Available for pre-order and scheduled to be in stock soon, the BRN-605 is based on the experimental, never-issued Colt 605A carbine – the predecessor of