None require an FFL (uppers are the serialed part). I'll work a deal if you want more than one thing.
** SigSauer Diopter/Hooded front sight kit - $185/shipped for sights alone, $75 more if you want me to leave the front hood installed on a US gas block for easier install (two large roll pins vs. dealing with the dovetail and tiny pin).
** Fishgill handguards - $125/shipped
**three hole sight rail - $60/shipped
** Original M4 style lower w/ stock and accessory folding mechanism - $425/shipped
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