M1128 projectile

The M1128 "Insensitive Munition High Explosive Base Burn Projectile" is a 155 mm boosted artillery round designed to achieve a maximum range of 30–40 kilometres (19–25 mi).

[2] The design program for the M1128 was established in FY2011 with the stated purpose of addressing USMC requirements for artillery ammunition capable of 30–40 kilometres (19–25 mi) range.

It carries a larger payload than the aging M549 Extended Range Projectile or ERP, which is the previous boosted round the M1128 is designed to replace.

Once approved, the plan for the M1128 is to enter the Engineering & Manufacturing Development Phase in the acquisition process as a fully funded program.

Tooling and processes have been developed and the initial production batch has been delivered to the proving grounds for testing by USMC resources.