What are the magazine capacities for the M16A3/M4A1 service rifle?

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What are the magazine capacities for the M16A3/M4A1 service rifle?

Magazines for these rifles come in two common standard sizes: 20 rounds and 30 rounds. The M16A3, being a full-size rifle, uses detachable 20- or 30-round magazines, while the M4A1 carbine also uses 5.56 NATO magazines and is most commonly issued with 30-round magazines, though 20-round mags are also available for certain missions or constraints. 10-round magazines aren’t standard for typical military service with these rifles, and 40-round magazines exist mainly as non-standard or aftermarket items. So, the practical, standard capacities you’ll see are 20 or 30 rounds.

Magazines for these rifles come in two common standard sizes: 20 rounds and 30 rounds. The M16A3, being a full-size rifle, uses detachable 20- or 30-round magazines, while the M4A1 carbine also uses 5.56 NATO magazines and is most commonly issued with 30-round magazines, though 20-round mags are also available for certain missions or constraints. 10-round magazines aren’t standard for typical military service with these rifles, and 40-round magazines exist mainly as non-standard or aftermarket items. So, the practical, standard capacities you’ll see are 20 or 30 rounds.

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