4140 Armory - 5.56x45mm NATO - 55 Gr FMJ-BT - 1000 Rnd/Case
Caliber - 556 NATO
Bullet Weight - 55 Gr
Bullet Type - Full Metal Jacket
Rounds Per Box - 1000
Muzzle Velocity (FPS) - 3200
Muzzle Energy (ft lbs) - 1280
Case Material - Brass
Condition - New
Attracts Magnet - No
4140 Armory 55 grain 5.56 NATO M193 full metal jacket boat tail rounds are made in Texas with Military Grade brass from General Dynamics which have been annealed for additional shoulder strength with tested and validated muzzle velocity of 3200 FPS. This round charge powder also use the General Dynamics smokeless ball powder charge for superior performance trusted by the US Military.
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