I'm planning on ordering an M4-A3 type upper with 14.5 inch barrel and permanantly installed phantom flash hider from the Bushmaster website soon. Is there currently a long wait time for uppers? Also, there used to be an option to add M4 handguards on the upper page but it's no longer there. Do these uppers come with M4 handguards or do you have to order them separately? Please let me know. Thanks!