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Arguably, the criticisms about range, accuracy, and lethality are related to the change in barrel length and twist between the M16 and M4. The earlier 5.56 rounds (the original M193) were optimized for a 20-inch (51 cm) barrel with a 1:12 twist. In 1980 STANAG 4172 defined the 5.56×45mm NATO chambering and its accompanying 1:7 twist rifling. [38]
Pages in category "5.45×39mm bolt-action rifles" The following 2 pages are in this category, out of 2 total. This list may not reflect recent changes. K.
The M249 SAW (Squad Automatic Weapon), [4] [5] [6] formally the Light Machine Gun, 5.56 mm, M249, is the United States Armed Forces adaptation of the Belgian FN Minimi, a light machine gun manufactured by FN Herstal (FN).
Close-up of L85A2 with Magpul Industries EMAG polymer magazine with clear viewing window. The STANAG magazine, while relatively compact compared to other types of 5.56×45mm NATO box magazines, has often been criticized for a perceived lack of durability and a tendency to malfunction unless treated with a level of care that may not be practical under combat conditions.