Explore an extensive selection of complete upper receivers designed to enhance the performance of your firearm. Featuring top brands like CMMG, Colt, PWS, and Maxim Defense Industries, these kits offer everything you need to upgrade your rifle with ease. Whether you're looking for a shorter barrel for improved maneuverability or a complete upper receiver with integrated rail systems, you'll find the perfect solution in this category. Increase your accuracy, reliability, and overall shooting experience by investing in a high-quality complete upper receiver from our diverse range of options.