MR762 A4 Upper Receiver Kit – 13″

The 13-inch upper receiver kit for the MR762 A4 in 7.62×51.

What an upper receiver kit is: the complete upper half of the rifle — barrel, gas system, bolt carrier group and handguard — without a lower receiver. It lets you change calibre or barrel length on an existing lower rather than buying a second complete rifle.

Fits: MR762 A4 lower receivers. MR762 components are caliber-specific — a 7.62 upper will not pair with an MR556 lower.

Worth knowing: a 13in upper on a stocked lower creates a short-barrelled rifle, which is regulated. Understand the rules first. The 16in kit avoids that.

Browse the upper receiver kits range, or upper receiver parts for individual components.

Firearms and regulated components are not sold directly on this site. Listings are informational and link to the manufacturer web shop or an authorised dealer. Upper receiver rules vary by jurisdiction — confirm what applies where you live.