The squad machine gun variant has a heavier barrel for higher firing range.

班机枪改型为较远射程有一个较沉重的枪身。

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Richard Taylor, a manager at the Aurora gun store and range Firing Line, said the 15-round restrictions on rifle magazines are "poorly worded" and are likely to affect owners of nearly every magazine.

CNN: Once-unlikely win for gun control in Colorado

Evidence suggests a fellow soldier firing a machine gun at a designated target placed on the range hit Ranger Maguire.

BBC: Ranger Michael Maguire