Lethal M4A1 Rifle Is Ready for War

[Feuer Frei!]

The US Army has now produced at least 117,000 battle-tested, upgraded M4A1 rifles engineered to more quickly identify, attack and destroy enemy targets with full auto-capability, consistent trigger-pull and a slightly heavier barrel, service officials said.

5.56x45mm NATO

Bullet weight/type ........... Velocity .......... Energy
4.0 g (62 gr) SS109 FMJBT 940 m/s (3,100 ft/s) 1,767 J (1,303 ft·lbf)
4.1 g (63 gr) D M11 FMJBT 936 m/s (3,070 ft/s) 1,796 J (1,325 ft·lbf)
4.1 g (63 gr) GP 90 FMJBT 905 m/s (2,970 ft/s) 1,679 J (1,238 ft·lbf)



6.8x43mm Remington SPC

Bullet weight/type......... Velocity.......... Energy
7.45 g (115 gr) fmj 2,575 ft/s (785 m/s) 1,694 ft·lbf (2,297 J)
7.78 g (120 gr) sst 2,460 ft/s (750 m/s) 1,612 ft·lbf (2,186 J)
7.10 g (110 gr) SPH*2,500 ft/s (760 m/s) 1,525 ft·lbf (2,068 J)


SOURCE

July 28, 2016