AR6460 = legislation enforcement semi-vehicle carbine with retractable inventory and 16 inch extensive barrel and bayonet lug I have never selected a flat major or A1 (without FA and deflector). I'm thinking a 16" flattop, in addition to a ten.5" with carry take care of like yours. I have a https://colt9mmupper46684.imblogs.net/76331172/an-unbiased-view-of-colt-10-5-upper