Discover the unparalleled possibilities for your AR-9 build with Arm or Ally’s meticulously curated selection of Lower Parts. Whether you’re assembling a new AR-9 or upgrading an existing one, our diverse categories cater to every enthusiast’s needs. Explore our comprehensive Lower Parts Kits, where brands like Aero Precision and Battle Arms Development contribute to precision-crafted kits, ensuring your lower receiver operates seamlessly.

Manage recoil and optimize charging efficiency with our Buffer Kits, featuring trusted brands like Aero Precision and JP Enterprises. Our Spare Parts category, including components from Magpul, Rise Armament, Aero Precision, and others, ensures the longevity and easy maintenance of your AR-9.

Equip yourself with reliable ammunition storage and feeding using our Magazines category, proudly featuring the renowned brand Magpul. Customize the ergonomics and aesthetics of your AR-9 with our Furniture category, offering a diverse array of accessories from Matador Arms, SB Tactical, Rise Armament, and more.

Take control of your shooting experience with precision triggers from our Triggers category, featuring respected brands like Rise Armament, TriggerTech, HIPERFIRE, and others. Arm or Ally is your trusted source for meticulously curated AR-9 Lower Parts, ensuring your build meets and exceeds your expectations in terms of functionality, reliability, and aesthetics.