VISITING FAMILY IN MARYLAND - RELATIVE WAS ASKING ME ABOUT COLTS FROM WHAT I GATHERED -COLT 6721 HBAR, COLT 6700 HBAR , COLT 6601 AND 6600 HBAR , COLT 6720 HBAR -COLT 6724- COLT 6731 -ARE LEGAL - WONDERING ABOUT THE COLT SP901 308 , AND THE COLT PISTON CARBINE 6940P ? ANY INFO ON COLT'S WOULD HELP THANKS - ALSO LOOKING FOR A FFL IN FREDERICK MARYLAND AREA FOR REASONABLE TRANSFER FEE THANKS