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M509A1 (8" Carrier Projectile)
The M509A1 is a US-developed, 8 inch (203 mm) boat-tailed, hollow-base, base-ejection, submunition-dispensing carrier (cargo, cluster, dispenser, etc.) projectile, which was designed for use by the M110 series of self-propelled howitzers (SPH). The M509A1 may be referred to as an 'Improved Conventional Munition' (ICM), or as an 'Dual Purpose ICM' (DPICM). The 'ICM' part denotes its improved on-target effectiveness in comparison to conventional...
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