A new barrel to provide less resistance, thus improving muzzle velocity (the barrel is a smoothbore, so the less friction there is on the way out, the more velocity the round retains.
An improved profile for the vertical cam to reduce the force needed to charge the weapon by 20-30 pounds; that will increase the cyclic rate
Redesigning the round-positioning block to decrease frequency of misfires, thus enhancing reliability.
A new cocking cam and lever design to provide a double-benefit: increased durability and shortened re-assembly time after maintenance.
Updated mechanical sight to aid accuracy, utilizing up to date ammunition ballistic data.