Primary Arms is your headquarters for AR 15 parts. Buy a complete AR 15 lower parts kit to fine-tune your latest build or individual parts like roll pins and detent springs. Find popular parts like a Bravo Company buffer tube, or a Magpul BAD Lever. All our lower parts come from the best manufacturers in the world, like Aero Precision, Anderson Manufacturing, Armalite, CMMG, Daniel Defense, Geissele, Hogue, JP Enterprises, Midwest Industries, Mission First Tactical, Odin Works, Radical Firearms, Rock River Arms, Seekins Precision, Strike Industries and more.
