20-millimeter M940, Multi-Purpose Traced with Self Destruct (MPT-SD)
The 20MM Multipurpose Tracer - Self Destruct cartridge with optimized ballistic projectile shape has demonstrated effectiveness against light armor at 1,000 meters range. This cartridge is effective against airborne and light surface threats at 2,000 meters range. The Multipurpose Concept projectile with delayed reaction carries the effectiveness inside the threat with large fragments and incendiary effects. Projectile self destruct at 2,300 meters minimum range minimizes collateral surface damage for engagement of airborne threats.
An early redesign of the M940 replaced the original copper rotating band with a shorter Electromagnetic Iron band as part of an effort to reduce peak operating pressures of the ammunition. This change created an increase in the amount of initial movement of the projectile in-bore before contact is made with the forcing cone of the barrel. With burst lengths expected for the CRAM mission, barrel wear was a concern for use of any metal banded projectile in the Land Based Phalanx Weapon System. The investigations conducted after the A/B versions of the PGU family also switched to the short iron bands concluded that the added clearance allowed the projectiles to reach velocities high enough before contact to mechanically damage the rifling. This effect is expected to be compounded by the long burst lengths in the CRAM application and it is desired to minimize the in-bore clearance through an extended rotating band design.
The Department of Defense FY 2006 Supplemental Request provides funds for 20mm M940 ammunition for the Counter Rocket and Mortar (C-RAM) system for forward operating bases in Iraq. This funding is in addition to $6 million provided by Title IX.
General Dynamics, Marion, Ill., was awarded on Feb. 17, 2006, a $5,999,991 modification to a firm-fixed-price contract for 20mm M940 Multipurpose Traces with Self-Destruct Cartridges. Work will be performed in Marion, Ill., and is expected to be completed by Oct. 31, 2006. Contract funds will not expire at the end of the current fiscal year. This was a sole source contract initiated on Jan. 31, 2006. The U.S. Army Field Support Command, Rock Island, Ill., is the contracting activity (W52P1J-05-C-0021).
On July 28, 2006 General Dynamics Ordnance and Tactical Systems, located in Marion, has been awarded a $8,575,849.20 contract by the U.S. Army. The contract is for the procurement of 316,600 each of 20mm M940 multi-purpose traced with self-destruct cartridges.
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