Complete your upper receiver build with AR-15 upper parts kits that include all the small components needed for a reliable and functional rifle. Whether you’re finishing a stripped upper or replacing worn parts, these kits offer mil-spec quality and compatibility with most standard AR-15 setups. Each kit typically includes the forward assist, ejection port cover, spring and pin hardware, and sometimes gas tube roll pins—making it easy to finish or refurbish your upper the right way. Trusted by builders and armorers alike, these kits ensure smooth function and tight tolerance fitment.
