Retro Arms is your premier destination for authentic and high-quality retro AR15 uppers and classic military-style rifle components. Specializing in historically accurate builds, we offer a wide selection of parts and kits including the iconic M16A1 upper, Colt M16A1 upper, and SP1 upper to help firearm enthusiasts and collectors complete their retro rifles with precision and authenticity.Our meticulously crafted retro AR uppers and retro M16 uppers are ideal for building classic clones such as the M16A4 clone, DEA carbine, and Colt LMG upper setups. Whether you’re assembling a retro AR15 upper, restoring a retro firearm, or sourcing a hard-to-find M16 upper kit, Retro Arms has you covered. We also carry specialized components like the Colt LMG handguard, M16 LSW parts, and Soviet Arms long rail systems for more advanced or hybrid configurations.At Retro Arms, we understand the passion for historically correct firearms. That’s why our inventory includes not only 556 uppers and 9mm uppers, but also dedicated retro uppers built to match vintage military specifications. Every retro arm we offer reflects a commitment to quality, heritage, and performance.For collectors, builders, and reenactors alike, Retro Arms is the trusted source for hard-to-find M16A1 upper receivers, retro AR uppers, and unique components like the retro arma series. Whether you’re building from scratch or upgrading an existing rifle, our comprehensive selection ensures you can complete your dream build down to the smallest detail.Explore Retro Arms and discover the finest collection of vintage-inspired rifle parts and accessories available online. Experience the legacy. Build the legend.