AR-15 Parts and Components
Arm or Ally is your trusted source for premium AR-15 parts, rifles, and accessories. Whether you’re starting your first AR15 build or refining a competition setup, our extensive catalog covers everything you need to assemble, upgrade, and maintain a reliable rifle. Every component we offer is built for precision, durability, and consistent performance in the field and at the range.
Comprehensive AR-15 Parts and Components
Start your build with the right foundation. Our selection includes AR-15 barrels for accuracy, bolt carrier groups for reliable cycling, and upper receivers designed for precise fit and alignment. You’ll also find handguards, buffer kits, and triggers that meet or exceed industry standards for function and reliability.
Essential Lower Small Parts and Accessories
Every reliable build depends on the details. Our collection of AR-15 lower small parts and accessories includes pins, springs, detents, and other precision-machined components that keep your rifle operating smoothly. Whether you’re replacing worn hardware or completing a new lower, these parts ensure long-term dependability and perfect fitment.
Build Kits and Complete Rifle Configurations
For an easier path to a finished rifle, explore our AR-15 builder sets and complete lower receiver kits. Matched components simplify assembly and guarantee alignment from barrel to stock. Whether you’re setting up a lightweight competition build, a defensive carbine, or a precision rifle, our inventory covers every option — from barrel profiles and gas systems to trigger preferences and finishes.
Performance Upgrades and Accessories
Fine-tune your rifle’s feel and function with upgrades that make a measurable difference. Fluted barrels improve balance and heat dissipation, while competition-grade triggers deliver a crisp, predictable break. Pair your setup with durable handguards and precision-machined upper receivers for the ideal balance of control, comfort, and performance.
Simple Shopping and Compatibility Confidence
Our online store is designed for clarity and efficiency. Each listing includes detailed specifications, compatibility notes, and high-resolution images so you can compare confidently. Whether you’re selecting a bolt carrier group, adjusting your trigger setup, or upgrading a buffer assembly, we make sure every part is clearly labeled and easy to integrate into your AR-15 build.
Quality You Can Trust
At Arm or Ally, quality is the foundation of everything we offer. We work with manufacturers who share our standards for precision and performance. Every barrel, receiver, and trigger we stock is built to perform consistently — whether on the range, in competition, or in service. When you choose Arm or Ally, you’re choosing proven reliability.
Top AR-15 Brands That Define Performance
We proudly feature parts from trusted names in the industry. Aero Precision is known for precisely machined receivers and builder sets. Ballistic Advantage produces match-grade barrels that set the accuracy standard. Faxon Firearms specializes in lightweight, fluted barrel designs. Bravo Company (BCM) delivers duty-grade parts trusted by professionals, while Rise Armament is renowned for its competition triggers. Each brand we carry represents the same precision and reliability that define Arm or Ally.
Find the Right AR-15 Parts for Your Build
Browse our full selection of upper receivers, handguards, and barrels to complete your rifle. Whether you’re replacing a single component or assembling from the ground up, you’ll find everything you need to build with precision, compatibility, and confidence. Shop our complete line of AR15 parts today.
