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XM144EarlySide
5.6×44mm XM144
Manufacturers

Frankford Arsenal

Designer

Irwin R. Barr

Year production began

1962

Year production ended

1960s

Cartridge type

Centerfire; bottlenecked

Overall length

49.71mm

Case length

43.88mm

Neck diameter

5.91mm

Shoulder diameter

7.48mm

Rim diameter

7.81mm

Rim thickness

1.22mm

Muzzle velocity

1220 m/s

Primer type

Small rifle

Used by

U.S.A.

The 5.6×44mm XM144 was an experimental military small arms cartridge developed by Frankford Arsenal.

DetailsEdit

It was developed as a competitor to the AAI-designed XM110 round, but also fires a single, saboted flechette, the same type as used in the XM110. However, the XM144 uses a traditional-style casing of a different size.

There were different variations of this round. One of them is the original XM144 with the saboted flechette projectile, which is fired at a muzzle velocity of 1220 m/s. Another is the XM144WE4, which is designed to use traditional blunt projectiles. But, what makes the WE4 version different is that the casing was made slightly thicker to accommodate additional propellant. Because of the differences in the casing, neither version is universal.

GalleryEdit

ReferencesEdit

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