I just recived my new colt car a3 6721. Love it.. Put the dainel defence omega 7 rails and single point sling mount. Badger tac charging handle release. eotech 512, Sure Fire tac light with forgrip. Nice Gun... Now I need time to break it in.. 1/9 twist h bar barrell. 16 in. None of this pre band sh*t.. Stamped on the reciver( law enforcment, Millitary, export only) Got to love the way thay do things in the south.