Question

what is the calibre of rifle 5.56 mm​

Answer 1

Answer:

The 5.56 x 45 mm round first came about during the late 1950s as an experimental cartridge for the U.S. Military M-16 rifle. This “small caliber, high velocity” round was desirable because it helped overcome weight and control issues present in the 7.62 x 51 mm round that was used in the previous-generation M-14 rifle.

Answer 2

Answer:

The 5.56 x 45 mm round first came about during the late 1950s as an experimental cartridge for the U.S. Military M-16 rifle. This “small caliber, high velocity” round was desirable because it helped overcome weight and control issues present in the 7.62 x 51 mm round that was used in the previous-generation M-14 rifle.

Explanation:

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