MIL-DTL-71186 Carbine, 5.56 Millimeter: M4A1This detail specification prescribes the requirements and identifies the verification procedures for the lightweight, air-cooled, gas operated, magazine-fed, 5.56 millimeter \(mm\) weapon designed for a full automatic burst or semi-automatic fire, hereafter referred to simply as the weapon.

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MIL-DTL-71186A

target, the heavy outline specified in Figure 1, located at 100 yards. The extreme spread shall be

in accordance with Figure 1. The M855, 5.56mm ball cartridges shall be in accordance with

drawing 9342868 and shall have an average vertical and horizontal standard deviation between

3.4 inches and 4.0 inches at 600 yards. For each weapon, the target and accuracy measurement

shall be taken using rounds number 5 thru 15 of the function firing semi-automatic (see 3.6.4.1)

verification.

FIGURE 1. Targeting and accuracy diagram

3.6.7 Endurance.

3.6.7.1 Endurance functioning. The weapon shall fire 6,000 rounds of M855, 5.56mm