Upper/Conv Kits-High Cap

Build, upgrade, and reload smarter with Armed2ATeeth.com’s elite selection of upper receivers, conversion kits, and high-capacity magazines. Whether you're customizing an AR-15, expanding your firearm’s versatility with a caliber conversion, or maximizing firepower with high-cap mags, this collection delivers the performance, durability, and fire-rate advantage serious shooters demand. Perfect for tactical operators, competitive shooters, and firearm enthusiasts, our premium components and accessories are engineered for fast installs, precision shooting, and battlefield-grade reliability. Take control of your firepower—upgrade with purpose.