I have a Bushmaster 16" upper "shorty" (true 16" barrel - no brake of any type) and it has a fixed front sight.. Is that a midlength or carbine length handguards? (edited to add) this is NOT my 450B, but my original 5.56 upper..
I want to put on some free float handguards and the more I look online the more I get confused and none seem to have the measurement stated, just mid or carbine..
thanks
brian