AAI ACR
In 1989/1990 AAI Corporation fielded a refined model of their previous models. Firing a 5.56 Flechette round the weapon shared many features in with its predecessors. A standard arrangement was utilized, a selector switch allowed for firing on semi-automatic or 3 round burst mode. Equipped with iron sights and the ACOG sight the weapon could be used even in low light conditions without replacing the sight. One feature unique to the AAI version is that when fired on burst mode three rounds cycle at once, allowing for the rounds to be downrange before the shooter has felt the recoil effects.
One of the problems AAI feared is that a user might try and place an M-16 magazine into the weapon and attempt to fire conventional 5.56 NATO ammunition in the weapon. A malfunction would occur during such a situation, threatening to possibly damage the weapon if not the user. The magazine AAI developed will only fit the flechette round and not a standard ball round.
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