BB Defense Builder Set

Builder sets are the perfect way to start your next rifle build where your lower receiver, upper receiver and handguard match perfectly.

About Your Builder Set

BB-15 Forged lower receivers are precision machined Mil-Spec 7075-T6 Aluminum with flared magazine well, threaded rear takedown pin detent screw, SAFE/FIRE markings, and installed billet aluminum enhanced trigger guard. Assembled Upper Receiver is made of 7075-T6 aluminum precision machined to Mil-Spec standards and comes with the dust cover and forward assist installed. 3 options of precision machined aluminum free float handguards and multiple options of Cerakote® coatings makes your next build just what you want.