Get your rifle ready for the range with an AR 15 parts kit from Primary Arms. We carry AR parts, components and complete lower parts kits from the best manufacturers in the world including Aero Precision, Anderson Manufacturing, CMC Triggers, CMMG Inc, Daniel Defense, JP Enterprises, Rock River Arms, Seekins Precision, Spike’s Tactical, Strike Industries and many more. Find what you’re looking for at the best prices, backed by Primary Arms industry-leading customer service.