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AUG 9mm
Taking advantage of the AUG's modularity, Steyr engineers
have designed a kit which allows the user to convert an
AUG into a 9mm carbine without the use of tools. The kit
consists of a barrel group, bolt group, 25-rd magazine, and
magazine adaptor. The carrier assembly differs from the
.223 version in that it does not require the use of a rotating
bolt. Also, the bolt allows only for right-handed ejection,
so the stock's port cover must be situated accordingly on
the left side. The magazine adaptor emulates the top of
a .223 magazine and remains affixed to the stock during
magazine changes. It contains its own bolt hold-open actuator
which is triggered by the 9mm magazine follower. Because
it utilizes the blowback principle, there is no gas port or
piston in the 16" barrel assembly. A 9mm AUG measures
665mm (26") in length and is 3/4 of an inch shorter than
an HK MP5A2 which uses only an 8.85" barrel. Without a
magazine, the AUG 9mm weighs approximately 7 lbs. as opposed
to an MP5A2 which weighs 5.9 lbs. However, while the MP5
seems to have been adopted by every worthwhile military
force and law enforcement agency worldwide, it is estimated
that there are less than 175 9mm AUG conversion kits in the U.S.
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