LANTAC USA M-SPEC AR-15 Upper Parts Kit

The LANTAC USA M-SPEC Upper Parts Kit is a complete set of small components needed to assemble or service the upper receiver on any AR-15 style rifle. Manufactured in the USA by LANTAC USA to current military specifications (M-SPEC), the kit is built using the correct materials, heat treatments, and finishes to deliver reliable drop-in performance on standard AR-15 platforms.

The UPK includes the ejection port cover, ejection port cover rod, ejection port cover spring, forward assist assembly, forward assist spring, and the associated small hardware required to complete a mil-spec AR-15 upper receiver. Each part is produced to the tight tolerances expected of a duty-grade build, making this kit equally well suited for completing a fresh build, replacing worn components, or field-stocking a service kit.

Finished in black and identified by LANTAC USA part number 01-PKIT-UP, this M-SPEC Upper Parts Kit is a straightforward, no-nonsense solution for builders and armorers who want mil-spec small parts for their AR-15.